var myMethods = {
	getClassParam : function(element, param) {				
		var result = null;
		$w($(element).className).each(function(c) {			
			if (c.startsWith(param + '_')) {				
				result = c.substring(param.length + 1);
			}
		});
		return result;
	}
} 
Element.addMethods(myMethods);


function removePx(t) {
	if (t.substring(t.length - 2) == 'px') {
		t = t.substring(0,t.length - 2);
	} 
	return parseInt(t, 10);
}