var string1
var string2
var string3
var string4
var string5
var string6
var endString ="\\end{array}$"
var string0
var string00

function writeEqn1(){
     string1 = "$\\begin{array}{rcl}\\lim_{h\\rightarrow 0+}\\,\\frac{f(0+h)-f(0)}{h}\\,&=&\\altLink{\\lim_{h\\rightarrow 0+}\\,\\frac{|0+h|-|0|}{h}}{Step 1.}\\\\"
     string2 = "&=&\\altLink{\\lim_{h\\rightarrow 0+}\\,\\frac{h}{h}\\; \\mbox{ since } h>0}{Step 2.}\\\\"
     string3 = "&=&\\altLink{1}{Step 3.}\\\\"
     string0 = string1+string2+string3+endString
}

function writeEqn2(){
     string4 = "$\\begin{array}{rcl}\\lim_{h\\rightarrow 0-}\\,\\frac{f(0+h)-f(0)}{h}\\,&=&\\altLink{\\lim_{h\\rightarrow 0-}\\,\\frac{|0+h|-|0|}{h}}{Step 1.}\\\\"
     string5 = "&=&\\altLink{\\lim_{h\\rightarrow 0-}\\,\\frac{-h}{h}\\; \\mbox{ since } h<0}{Step 2.}\\\\"
     string6 = "&=&\\altLink{ -1}{Step 3.}\\\\"
     string00 = string4+string5+string6+endString
}