var string1 = "Test"
var string2
var string3
var string4
var string5
var string6
var string7
var endString ="\\end{array}$"
var string0 = string1+endString

function writeEqn(){
     string1 = "$\\begin{array}{rcl}\\frac{d}{dx}\\,\\tan(x)&=&\\altLink{\\,\\frac{d}{dx}\\,\\frac{\\sin(x)}{\\cos(x)}}{Step 1.}\\\\"
     string2 = "&=&\\altLink{\\,\\frac{\\cos(x)\\,\\frac{d\\,\\sin(x)}{dx}\\,-\\,\\sin(x)\\,\\frac{d\\,\\cos(x)}{dx}}{\\cos^2(x)}}{Step 2.}\\\\"
     string3 = "&=&\\altLink{\\,\\frac{\\cos(x)\\cdot\\cos(x)\\,-\\,\\sin(x)\\cdot-\\sin(x)}{\\cos^2(x)}}{Step 3.}\\\\"
     string4 = "&=&\\altLink{\\,\\frac{\\cos^2(x)\\,+\\,\\sin^2(x)}{\\cos^2(x)}}{Step 4.}\\\\"
     string5 = "&=&\\altLink{\\,\\frac{1}{\\cos^2(x)}}{Step 5.}\\\\"
     string6 = "&=&\\altLink{\\,\\sec^2(x)}{Step 6.}\\\\"
     string0 = string1+string2+string3+string4+string5+string6+endString     
}