//enable string.trim()
String.prototype.trim = function() { return this.replace(/^\s+|\s+$/g,""); }//enable string.trim()


//get the value of a set of radio buttons
function getRadiosValue(containingElem,radiosName){
		var radiosValue = "";
		var radios = document.getElementById(containingElem);
		if (radios) {
				var inputs = radios.getElementsByTagName('input');
				if (inputs) {
					for (var i = 0; i < inputs.length; ++i) {
						if (inputs[i].type == 'radio' && inputs[i].name == radiosName){
							if (inputs[i].checked == true){ radiosValue = inputs[i].value};}
						}
					}		
				}
	return radiosValue;
}//end getRadiosValue()


function hash13(c) {
	var a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
	var b = "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM";
	p = "";
	for (i=0; i<c.length; i++) {
		var j = c.charAt(i);
		p += (j>='a' && j<='z' || j>='A' && j<='Z' ? b.charAt(a.indexOf(j)) : j);
	}
	return p;
}//end hash13