var addEvent;
if (document.addEventListener) {
	addEvent = function(element, type, handler) {
		element.addEventListener(type, handler, null);
	}
}
else if (document.attachEvent) {
	addEvent = function(element, type, handler) {
	element.attachEvent("on" + type, handler);
	}
}
else {
	addEvent = new Function; // not supported
}
 
function get_target(e) {
	if (window.event && window.event.srcElement)
		return window.event.srcElement ;
	if (e && e.target)
		return e.target ;
	if (!el)
		return false ;
}

function climb_dom(e, tag_type) {
	while (e.nodeName.toLowerCase() != tag_type && e.nodeName.toLowerCase() != 'html') e = e.parentNode ;
	return (e.nodeName.toLowerCase() == 'html') ? null : e ;
}

function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}