/*
This script calculates the appropriate coverage needed based on form
inputs.
*/



function  doMath() {
	var theForm = document.forms.theForm;
	var one = eval(theForm.elements[0].value)
	var two = eval(theForm.elements[1].value)  
	var prod = one  *   two
	
	function outputComma(number) { // (c) irt.org
		number = '' + number;
		if (number.length > 3) {
		var mod = number.length%3;
		var output = (mod > 0 ? (number.substring(0,mod)) : '');
		for (i=0 ; i < Math.floor(number.length/3) ; i++) {
			if ((mod ==0) && (i ==0))
				output += number.substring(mod+3*i,mod+3*i+3);
			else
				output += ',' + number.substring(mod+3*i,mod+3*i+3);
		}
		return (output);
	}
	else return number;
	}
	
	theForm.coverage.value = outputComma(prod);
}