var step=0
var step2=0
var string1
var string2
var string3
var string4
var string5
var string6
var endString ="\\end{array}"
var string0 = string1+endString
var string00 = string1+endString
function writeEqn1(){
   if (step == 0){
     string1 = "\\begin{array}{rcl}\\lim_{h\\rightarrow 0+}\\,\\frac{f(0+h)-f(0)}{h}\\,&=&\\lim_{h\\rightarrow 0+}\\,\\frac{|0+h|-|0|}{h}\\\\"
     string0 = string1+endString
     step = 1
   }
   else { if (step == 1){
     string2 = "&=&\\lim_{h\\rightarrow 0+}\\,\\frac{h}{h}\\; \\mbox{ since } h>0\\\\"
     string0 = string1+string2+endString
     step=2
   }
   else { if (step == 2) {
     string3 = "&=&1\\\\"
     string0 = string1+string2+string3+endString
     step=3
     document.derivative1.Continue.value="Done!"
   }
   }}
}
function writeEqn2(){
   if (step2 == 0){
     string4 = "\\begin{array}{rcl}\\lim_{h\\rightarrow 0-}\\,\\frac{f(0+h)-f(0)}{h}\\,&=&\\lim_{h\\rightarrow 0-}\\,\\frac{|0+h|-|0|}{h}\\\\"
     string00 = string4+endString
     step2 = 1
   }
   else { if (step2 == 1){
     string5 = "&=&\\lim_{h\\rightarrow 0-}\\,\\frac{-h}{h}\\; \\mbox{ since } h<0\\\\"
     string00 = string4+string5+endString
     step2=2
   }
   else { if (step2 == 2) {
     string6 = "&=&-1\\\\"
     string00 = string4+string5+string6+endString
     step2=3
     document.derivative2.Continue.value="Done!"
   }
   }}
}