function $(obj){
	return document.getElementById(obj);	
}



function getElementsByClass(node,searchClass,tag) {
	var classElements = new Array();
	//alert(node);
	var els = node.getElementsByTagName(tag); // use "*" for all elements
	var elsLen = els.length;
	var pattern = new RegExp("\\b"+searchClass+"\\b");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) { 
			classElements[j] = els[i]; 
			j++; 
		}
	}
	return classElements;
}

function showdiv(idx){
	for(var i=0;i<sb.length;i++){
		sb[i].style.display="none";	
	}
	$("submenu_"+idx).style.display="block";
}



function validateEmail(emailStr){
	var re=/^[\w-.]+(\.*[\w-]+)*@([0-9a-z]+(([0-9a-z]*)|([0-9a-z-]*[0-9a-z]))+\.)+[a-z]{2,3}$/i;
	if(re.test(emailStr))
		return true;
	else
		return false;
}