var aVar = 1
var bVar = 1
var cVar = 1
var dVar = 1
var step = 0
var poly
var string1 = "Test"
var string2
var string3
var string4
var string5
var string6
var endString ="\\end{array}"
var string0 = string1+endString

function writeNewEqn(){
   with(Math){
     aVar = round(10*random()+1)
     bVar = round(10*random()+1)
     cVar = round(10*random()+1)
     dVar = round(10*random()+1)
   }
   poly="f(x)="+aVar+"x^3+"+bVar+"x^2+"+cVar+"x+"+dVar
   step=0
}
function writeEqn(){
   if (step == 0){
     string1 = "\\begin{array}{rcl}f'(x)&=&"
     string0 = string1+endString
     step = 1
   }
   else { if (step == 1){
     string2 = "\\frac{d}{dx}\\,"+aVar+"x^3+"+bVar+"x^2+"+cVar+"x+"+dVar+"\\\\"
     string0 = string1+string2+endString
     step=2
   }
   else { if (step == 2) {
     string3 = "&=&\\frac{d}{dx}\\,"+aVar+"x^3+\\frac{d}{dx}\\,"+bVar+"x^2+\\frac{d}{dx}\\,"+cVar+"x+\\frac{d}{dx}\\,"+dVar+"\\\\"
     string0 = string1+string2+string3+endString
     step=3
   }
   else { if (step == 3) {
     string4 = "&=&"+aVar+"\\frac{d}{dx}\\,x^3+"+bVar+"\\frac{d}{dx}\\,x^2+"+cVar+"\\frac{d}{dx}\\,x+\\frac{d}{dx}\\,"+dVar+"\\\\"
     string0 = string1+string2+string3+string4+endString
     step=4
   }
   else { if (step == 4) {
     string5 = "&=&"+aVar+"\\cdot 3x^2+"+bVar+"\\cdot 2x^1+"+cVar+"\\cdot 1+0\\\\"
     string0 = string1+string2+string3+string4+string5+endString     
     step=5
   }
   else { if (step == 5) {
     aT=3*aVar
     bT=2*bVar
     string6 = "&=&"+aT+"x^2+"+bT+"x+"+cVar+"\\\\"
     string0 = string1+string2+string3+string4+string5+string6+endString     
     step=6
     document.derivative.Continue.value="Done!"
   }
   }}}}}
}