var boxtype='med';

function ChangeBoxType(){


    eval('document.all.l_data_'+boxtype+'.style.display="none"');
    boxtype=sel_boxtype.options[sel_boxtype.options.selectedIndex].value;
    eval('document.all.l_data_'+boxtype+'.style.display="block"');
    eval('document.images["img_box"].src="pic/calc_flat_'+boxtype+'.wmf"');
    
    
    
};

//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function rad(gr){
                   return(gr*Math.PI/180);
};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_med(){

   var a=parseFloat(f_data_med.t_a.value);
   var b=parseFloat(f_data_med.t_b.value);
   var c=parseFloat(f_data_med.t_c.value);
   var f=parseFloat(f_data_med.t_f.value);
   var g=parseFloat(f_data_med.t_g.value);
   var l=parseFloat(f_data_med.t_l.value);
   var price=0; //parseFloat(f_data_med.t_price.value);
   var num=parseFloat(f_data_med.t_num.value);
   var big=0;
   var knifes=0;


 if((a>0 & b>0 & c>0 & f>0 & g>0 & l>0 & num>0) & (f<c & g<a & l<b & a>b) & (a+b+c>160)){
    
   big=4*(a+b+c)-22;
   knifes=(c+0.5)+(a+0.5)+2*(l/Math.cos(rad(15)))+(c-2*l*Math.tan(rad(15)))+(a+1)+4*(b-1+(g-2.5)*(1-Math.cos(rad(85)))/Math.cos(rad(5))+(g-6)*(1-Math.cos(rad(75)))/Math.cos(rad(15))+4.5/Math.cos(rad(45)))+2*(2*b+14+2*(1.2*(f-0.5)*(Math.PI/2-Math.acos(1/1.2)))+a-1-2*(f-0.5)*(1.2-Math.sqrt(1.2*1.2-1)))+14;

   if(a+b+c>500){price=price_med[0]};
   if(a+b+c>250 & a+b+c<=500){price=price_med[1]};
   if(a+b+c>160 & a+b+c<=250){price=price_med[2]};
   if(num>=24){price=price+price_med_correction[1]}else{if(num>=12){price=price+price_med_correction[0]}};   

   f_data_med.t_price.value=Math.round(price*100)/100;

   f_data_med.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_med.t_big_length.value=Math.round(big*num)/1000;
   f_data_med.t_total_length.value=Math.round((big+knifes)*num)/1000;
   f_data_med.t_total_cost.value=Math.round((big+knifes)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};
};
//---------------------------------------------------------------------------
function Sum_4klap(){

   var l=parseFloat(f_data_4klap.t_l.value);
   var b=parseFloat(f_data_4klap.t_b.value);
   var h=parseFloat(f_data_4klap.t_h.value);
   var d=parseFloat(f_data_4klap.t_d.value);
   var t=parseFloat(f_data_4klap.t_t.value);
   var price=parseFloat(f_data_4klap.t_price.value);
   var num=parseFloat(f_data_4klap.t_num.value);
   var big=0;
   var knifes=0;

 if(l>0 & b>0 & h>0 & d>0 & t>0 & price>0 & num>0){

   big=4*(l+b+h+2*t)-6;
   knifes=2*h+20*t+12*b+4*l+2*d/Math.cos(rad(15))-2*d/Math.tan(rad(15))+4;

   f_data_4klap.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_4klap.t_big_length.value=Math.round(big*num)/1000;
   f_data_4klap.t_total_length.value=Math.round((big+knifes)*num)/1000;
   f_data_4klap.t_total_cost.value=Math.round((big+knifes)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_427(){

   var l=parseFloat(f_data_427.t_l.value);
   var b=parseFloat(f_data_427.t_b.value);
   var h=parseFloat(f_data_427.t_h.value);
   var d=parseFloat(f_data_427.t_d.value);
   var t=parseFloat(f_data_427.t_t.value);
   var price=price_427[0];
   if(t>1.5){price=price_427[1]};
   f_data_427.t_price.value=price;
   var num=parseFloat(f_data_427.t_num.value);
   var big=0;
   var knifes=0;
   var pi=Math.PI;

 if(l>0 & b>0 & h>0 & d>0 & t>0 & price>0 & num>0){

   big=4*l+6*h+22/3*b+t*(17.5-Math.sqrt(3))-4;

   knifes=t/Math.sqrt(2);
   knifes+=pi/2*(4/5*h-t/2)+pi/2*h/5+3/5*h;
   knifes+=2*t*rad(165)+2*rad(75)*Math.round(d/3);
   knifes+=2*(d/Math.cos(rad(15))-(1-Math.sin(rad(15)))/Math.cos(rad(15))*(Math.round(d/3)+t));
   knifes+=b+2*t-t/2-2*t*Math.cos(rad(15))-2*Math.cos(rad(15))*Math.round(d/3)-2*Math.sin(rad(15))*(d/Math.cos(rad(15))-(1-Math.sin(rad(15)))/Math.cos(rad(15))*(Math.round(d/3)+t));
   knifes+=t/2+3/4*t;
   knifes+=2*(b/2-3-3/4*t+rad(85)*(t+3)+((b/2-3)*0.75-(t+3)*(1-Math.sin(rad(5))))+(h+t/4-(t+3)*Math.cos(rad(5))-Math.sin(rad(5))*((b/2-3)*0.75-(t+3)*(1-Math.sin(rad(5))))));
   knifes+=t/4*(Math.sqrt(10)+Math.sqrt(37))+2*(h+t)+2*t*Math.sqrt(7.25)+2*(h+t/4)+b-t/2+4*t;
   knifes+=2*(b/3+8.5*t+2);
   knifes=knifes*2;
   knifes+=l+3*t+l+2.5*t;

   f_data_427.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_427.t_big_length.value=Math.round(big*num)/1000;
   f_data_427.t_total_length.value=Math.round((big+knifes)*num)/1000;
   f_data_427.t_total_cost.value=Math.round((big+knifes)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_c2(){

   var l=parseFloat(f_data_c2.t_l.value);
   var b=parseFloat(f_data_c2.t_b.value);
   var h=parseFloat(f_data_c2.t_h.value);
   var t=parseFloat(f_data_c2.t_t.value);
   var price=price_c2[0];
   if(t>1.5){price=price_c2[1]};
   f_data_c2.t_price.value=price;
   var num=parseFloat(f_data_c2.t_num.value);
   var big=0;
   var knifes=0;

   var bigs=new Array;
   var kns=new Array;
   var pi=Math.PI;



 if(l>0 & b>0 & h>0 & t>0 & price>0 & num>0){

   bigs[0]=l+12-2*(t/2+0.5)-2*(1+t/2-1.5);
   bigs[1]=l+12-2*(t/2+0.5);
   bigs[2]=l+12-2*1;
   bigs[3]=h+t-0.75*t;
   bigs[4]=h+t/2-(0.75*t+0.5);
   bigs[5]=h+t-3*(1+t/2);
   bigs[6]=b-(t/2+0.5)-(t+1.5);
   bigs[7]=b;
   bigs[8]=b-(bigs[6]/3+2)-t-(t/2+0.5);

   big=bigs[0]+bigs[1]*2+bigs[2]+2*(bigs[3]+bigs[4]+bigs[5]+bigs[6]+bigs[7]+bigs[8]);
   

   kns[0]=bigs[0];
   kns[1]=bigs[2]-2*(1+t/2);


   kns[21]=pi/2*(1+t/2);
   if(t<6){kns[22]=(6-t)*3.5}else{kns[22]=0};
   kns[23]=(h+t-20-(1+t/2))*pi/2;

  if((h+t-20-(1+t/2))+(h+t/2)/10<bigs[5]){
                                          kns[24]=(h+t/2)/10*pi/2;
                                          kns[25]=Math.sqrt(Math.pow(Math.round((b-(t/2+0.5))/3)-t/2-4,2)+Math.pow(h+t-(h+t-20)-(h+t/2)/10,2));
                                          kns[26]=(h+t-20-(1+t/2))+kns[22]-(h+t/2)/10-(Math.round((b-(t/2+0.5))/3)-t/2-4);
                                         }
                                     else{
                                          kns[24]=(bigs[5]-kns[23]/(pi/2))*pi/2;
                                          kns[25]=kns[23]/(pi/2)+kns[22]-kns[24]/(pi/2);
                                          kns[26]=0;
                                         };




   kns[2]=0.75*t;
   kns[3]=b-t;
   kns[4]=h+t-0.75*t-(1+t/2);
   kns[5]=b-t-(1+t/2);
   kns[6]=(1+t/2)*(pi/2+Math.acos(1.5/(1+t/2)));
   kns[7]=b+t/2-Math.sqrt((1+t/2)*(1+t/2)-1.5*1.5);
   kns[8]=4*Math.sqrt(2);
   kns[9]=b-t-4-kns[24]/(pi/2);
   kns[10]=kns[24];
   kns[11]=h-20-kns[24]/(pi/2)-1.5*t;
   kns[12]=Math.sqrt(1.5*t*1.5*t+(t/2+0.5)*(t/2+0.5));
   kns[13]=(t/2+0.5)+t;
   kns[14]=bigs[4];
   kns[15]=Math.sqrt(Math.pow(t+1.5,2)+Math.pow(t*2+(6-t)*0.25,2));
   kns[16]=bigs[4]-1;
   kns[17]=b-(t/2+0.5)-(t+1.5)+2*(t+2);
   kns[18]=Math.sqrt(Math.pow(t/2+0.5,2)+Math.pow(t*2+(6-t)*0.25,2));
   kns[19]=b+t*3/2-(t*2+(6-t)*0.25);
   kns[20]=1;

 

   kns[27]=(1+t/2)*pi;
   kns[28]=(bigs[6]/3+2)*2+(t*2+(6-t)*0.25)*2; //2*(2+Math.round((b-(t/2+0.5))/3)-t/2+t*2+(6-t)*0.25);



     for(i=2;i<kns.length;i++){
                               knifes+=Math.round(kns[i]*100)/100;
                              };

     knifes=knifes*2;
     knifes+=kns[0]+kns[1];

   f_data_c2.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_c2.t_big_length.value=Math.round(big*num)/1000;
   f_data_c2.t_total_length.value=Math.round((big+knifes)*num)/1000;
   f_data_c2.t_total_cost.value=Math.round((big+knifes)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_konf1(){

   var a=parseFloat(f_data_konf1.t_a.value);
   var b=parseFloat(f_data_konf1.t_b.value);
   var h=parseFloat(f_data_konf1.t_h.value);

   var t=parseFloat(f_data_konf1.t_t.value);
   var price=parseFloat(f_data_konf1.t_price.value);
   var num=parseFloat(f_data_konf1.t_num.value);

   var addc=parseFloat(f_data_konf1.t_addc.value);
   var addf=parseFloat(f_data_konf1.t_addf.value);
   var addg=parseFloat(f_data_konf1.t_addg.value);

   var addd1=parseFloat(f_data_konf1.t_addd1.value);
   var addd2=parseFloat(f_data_konf1.t_addd2.value);
   var addd3=parseFloat(f_data_konf1.t_addd3.value);
   var addd4=parseFloat(f_data_konf1.t_addd4.value);
   var addd5=parseFloat(f_data_konf1.t_addd5.value);

   var addr1=parseFloat(f_data_konf1.t_addr1.value);
   var addr2=parseFloat(f_data_konf1.t_addr2.value);
   var addr3=parseFloat(f_data_konf1.t_addr3.value);

   var big=0;
   var knifes=0;
   var perfs=0;

   var bigs=new Array;
   var kns=new Array;
   var prfs=new Array;
   var pi=Math.PI;

  
  

 if(a>0 & b>0 & h>0 & t>0 & price>0 & num>0){


   var r=1;

   bigs[0]=b;
   bigs[1]=b-2*addd1;
   bigs[2]=a;
   bigs[3]=a-2*addd3-2*addd1;
   bigs[4]=h-addd2-addf-addd3;
   bigs[5]=h-r*SinG(80)-(addd1-r*(1-CosG(80)))*TanG(10);
   bigs[6]=bigs[5]+addd3;

   big=bigs[0]*2+bigs[1]*2+bigs[2]*2+bigs[3]*2+bigs[4]*4+bigs[5]*4+bigs[6]*4;
   
   prfs[0]=bigs[1];
   prfs[1]=bigs[6]/(1+TanG(10))/SinG(45)-addr2*0.2;
   
   perfs=prfs[0]*2+prfs[1]*4;


   kns[0]=bigs[1];
   kns[1]=addc+addd3;
   kns[2]=addg;
   kns[3]=h-addd2-addf-addr1-addd3;
   kns[4]=addr1*pi/2;
   kns[5]=kns[2]-addr1;
   kns[6]=addf;
   kns[7]=r*rad(80)+2*(addd1-r*(1-CosG(80))); //r*rad(80)+2/CosG(10)*(addd1-r*(1-CosG(80)));
   kns[8]=2*(bigs[6]/(1+TanG(10))/CosG(10))-addr2*0.175;

   kns[9]=kns[7]-0.5;
   kns[10]=addf-addd4;
   kns[11]=addg+1-addr1;
   kns[12]=addr1*pi/2;
   kns[13]=h-addd5-kns[10]-addr1;
   kns[14]=bigs[3]-2*(addg+1);

   knifes=kns[0]*2+kns[1]*4+kns[2]*4+kns[3]*4+kns[4]*4+kns[5]*4+kns[6]*4+kns[7]*4+kns[8]*4+kns[9]*4+kns[10]*4+kns[11]*4+kns[12]*4+kns[13]*4+kns[14]*2;


   f_data_konf1.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_konf1.t_big_length.value=Math.round(big*num)/1000;
   f_data_konf1.t_perf_length.value=Math.round(perfs*num)/1000;
   f_data_konf1.t_total_length.value=Math.round((big+knifes+perfs)*num)/1000;
   f_data_konf1.t_total_cost.value=Math.round((big+knifes+perfs)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_konf2(){

   var a=parseFloat(f_data_konf2.t_a.value);
   var b=parseFloat(f_data_konf2.t_b.value);
   var h=parseFloat(f_data_konf2.t_h.value);

   var t=parseFloat(f_data_konf2.t_t.value);
   var price=parseFloat(f_data_konf2.t_price.value);
   var num=parseFloat(f_data_konf2.t_num.value);

   var addc=parseFloat(f_data_konf2.t_addc.value);
   var addf=parseFloat(f_data_konf2.t_addf.value);
   var addg=parseFloat(f_data_konf2.t_addg.value);

   var addd1=parseFloat(f_data_konf2.t_addd1.value);
   var addd2=parseFloat(f_data_konf2.t_addd2.value);
   var addd3=parseFloat(f_data_konf2.t_addd3.value);
   var addd4=parseFloat(f_data_konf2.t_addd4.value);

   var big=0;
   var knifes=0;
   var perfs=0;

   var bigs=new Array;
   var kns=new Array;
   var prfs=new Array;
   var pi=Math.PI;

  
  

 if(a>0 & b>0 & h>0 & t>0 & price>0 & num>0){


   bigs[0]=b;
   bigs[1]=b-2*addd2;
   bigs[2]=a-2*addd1;
   bigs[3]=a+2*(h+addf);
   bigs[4]=h+addf;
   
   big=bigs[0]*2+bigs[1]*2+bigs[2]*2+bigs[3]*2+bigs[4]*4;


   prfs[0]=bigs[1];
   prfs[1]=bigs[2]-2*addd4;
   
   perfs=prfs[0]*2+prfs[1]*2;


   kns[0]=prfs[1]-2*(addc/TanG(addd3));
   kns[1]=addc/SinG(addd3);
   kns[2]=addd4+addd1+h+addf;
   kns[3]=h+addf-addg;
   kns[4]=addd1+h+addf-addg;
   kns[5]=addg/CosG(45);
   kns[6]=h+addd1-addd2;
   kns[7]=addd2/CosG(45);
   kns[8]=addf;
   kns[9]=addc/CosG(35);
   kns[10]=prfs[0]-2*(kns[9]*CosG(addd3));

   knifes=kns[0]*2+kns[1]*4+kns[2]*4+kns[3]*4+kns[4]*4+kns[5]*4+kns[6]*4+kns[7]*4+kns[8]*4+kns[9]*4+kns[10]*2;


   f_data_konf2.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_konf2.t_big_length.value=Math.round(big*num)/1000;
   f_data_konf2.t_perf_length.value=Math.round(perfs*num)/1000;
   f_data_konf2.t_total_length.value=Math.round((big+knifes+perfs)*num)/1000;
   f_data_konf2.t_total_cost.value=Math.round((big+knifes+perfs)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_konf3(){

   var a=parseFloat(f_data_konf3.t_a.value);
   var b=parseFloat(f_data_konf3.t_b.value);
   var h=parseFloat(f_data_konf3.t_h.value);

   var t=parseFloat(f_data_konf3.t_t.value);
   var price=parseFloat(f_data_konf3.t_price.value);
   var num=parseFloat(f_data_konf3.t_num.value);

   var addc=parseFloat(f_data_konf3.t_addc.value);
   var addf=parseFloat(f_data_konf3.t_addf.value);
   var addg=parseFloat(f_data_konf3.t_addg.value);

   var addd1=parseFloat(f_data_konf3.t_addd1.value);
   var addd2=parseFloat(f_data_konf3.t_addd2.value);
   var addd3=parseFloat(f_data_konf3.t_addd3.value);
   var addd4=parseFloat(f_data_konf3.t_addd4.value);

   var big=0;
   var knifes=0;
   var perfs=0;

   var bigs=new Array;
   var kns=new Array;
   var prfs=new Array;
   var pi=Math.PI;

  
  

 if(a>0 & b>0 & h>0 & t>0 & price>0 & num>0){


   bigs[0]=b;
   bigs[1]=b-2*addd2;
   bigs[2]=a-2*addd1;
   bigs[3]=a+2*(h+addf);
   bigs[4]=h+addf-addd4;
   
   big=bigs[0]*2+bigs[1]*2+bigs[2]*2+bigs[3]*2+bigs[4]*4;

   
   var al=Math.atan(addc/(addc+addd4-3));

   prfs[0]=bigs[1]-2*addd3;
   prfs[1]=bigs[2]-2*(addc+addd4);
   
   perfs=prfs[0]*2+prfs[1]*2;


   kns[0]=bigs[2]-2*3;
   kns[1]=(addc+addd4)/SinR(al);
   kns[2]=(bigs[3]-bigs[2])/2+addc+addd4+addd4/TanR(al);
   kns[3]=bigs[4]-addg;
   kns[4]=(bigs[3]-bigs[2])/2-addg;
   kns[5]=addg*Math.SQRT2;
   kns[6]=h+addd1-addd2;
   kns[7]=addd2/CosG(45);
   kns[8]=Math.sqrt(addf*addf+addd3*addd3);
   kns[9]=Math.sqrt(addc*addc+Math.pow(addd2+addd3,2));
   kns[10]=bigs[0];

   knifes=kns[0]*2+kns[1]*4+kns[2]*4+kns[3]*4+kns[4]*4+kns[5]*4+kns[6]*4+kns[7]*4+kns[8]*4+kns[9]*4+kns[10]*2;


   f_data_konf3.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_konf3.t_big_length.value=Math.round(big*num)/1000;
   f_data_konf3.t_perf_length.value=Math.round(perfs*num)/1000;
   f_data_konf3.t_total_length.value=Math.round((big+knifes+perfs)*num)/1000;
   f_data_konf3.t_total_cost.value=Math.round((big+knifes+perfs)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
function Sum_konf4(){

   var a=parseFloat(f_data_konf4.t_a.value);
   var b=parseFloat(f_data_konf4.t_b.value);
   var h=parseFloat(f_data_konf4.t_h.value);

   var t=parseFloat(f_data_konf4.t_t.value);
   var price=parseFloat(f_data_konf4.t_price.value);
   var num=parseFloat(f_data_konf4.t_num.value);

   var addc=parseFloat(f_data_konf4.t_addc.value);
   var addf=parseFloat(f_data_konf4.t_addf.value);
   var addg=parseFloat(f_data_konf4.t_addg.value);

   var addd1=parseFloat(f_data_konf4.t_addd1.value);
   var addd2=parseFloat(f_data_konf4.t_addd2.value);
   var addd3=parseFloat(f_data_konf4.t_addd3.value);
   var addd4=parseFloat(f_data_konf4.t_addd4.value);

   var big=0;
   var knifes=0;
   var perfs=0;

   var bigs=new Array;
   var kns=new Array;
   var prfs=new Array;
   var pi=Math.PI;

  
  

 if(a>0 & b>0 & h>0 & t>0 & price>0 & num>0){


   bigs[0]=b;
   bigs[1]=b;
   
   bigs[2]=a-2*addd1;
   bigs[3]=a+2*(h+addf);
   bigs[4]=h+addf;
   
   big=bigs[0]*2+bigs[1]*2+bigs[2]*2+bigs[3]*2+bigs[4]*4;


   prfs[0]=b;
   prfs[1]=bigs[2];
   
   perfs=prfs[0]*2+prfs[1]*2;


   var w2=1;

   kns[0]=bigs[2]-2*(addc/2+w2);
   kns[1]=addc/2*Math.SQRT2;
   kns[2]=Math.sqrt(Math.pow(addc/2,2)+Math.pow(addc+w2,2));
   kns[3]=Math.sqrt(Math.pow(addd1+h+addf,2)+Math.pow(addd4,2));
   kns[4]=bigs[4]-addg-addd3-addd4;
   kns[5]=Math.sqrt(Math.pow(addd1+h+addf-addg,2)+Math.pow(addd3,2));
   kns[6]=addg*Math.SQRT2;
   kns[7]=addd1+h+addf;
   kns[8]=Math.sqrt(Math.pow(addc,2)+Math.pow(addd2,2));
   kns[9]=b-2*addd2;

   knifes=kns[0]*2+kns[1]*4+kns[2]*4+kns[3]*4+kns[4]*4+kns[5]*4+kns[6]*4+kns[7]*4+kns[8]*4+kns[9]*2;
 

   f_data_konf4.t_knifes_length.value=Math.round(knifes*num)/1000;
   f_data_konf4.t_big_length.value=Math.round(big*num)/1000;
   f_data_konf4.t_perf_length.value=Math.round(perfs*num)/1000;
   f_data_konf4.t_total_length.value=Math.round((big+knifes+perfs)*num)/1000;
   f_data_konf4.t_total_cost.value=Math.round((big+knifes+perfs)*price*num/10)/100;

     }
 else{alert('Неверно введены исходные данные!')};

};
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
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function SinG(grads){ return(Math.sin(rad(grads))) };
function CosG(grads){ return(Math.cos(rad(grads))) };
function TanG(grads){ return(Math.tan(rad(grads))) };
//---------------------------------------------------------------------------
function SinR(rads){ return(Math.sin(rads)) };
function CosR(rads){ return(Math.cos(rads)) };
function TanR(rads){ return(Math.tan(rads)) };
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------