function Check(str,obj){
//	var s = /[~`@#\$%\^&\*\(\)\{\}\[\]\|'<>/?\\]/;   
	var s = "([a-zA-Z0-9_-])";
	var re = str.match(s);   

	if(re == null){
		document.getElementById(obj).innerHTML="<font color=red>Wrong</font>";
		return false; 		
	}   
	document.getElementById(obj).innerHTML = "";
	return true;
}