//==================crossbrowser class adding============
	var u = navigator.userAgent.toLowerCase();
	is = function(t){return (u.indexOf(t)!=-1)};
	addClass = function(el,val){
		if(!el.className) {
			el.className = val;
		} else {
			var newCl = el.className;
			newCl+=(" "+val);
			el.className = newCl;
		}
	}
	var el = document.getElementsByTagName('html')[0];
	if(is('msie 6')){ 
		if(!is('msie 7')){ 
			ie6=true;
			addClass(el,'msie6');
		}
	}
//==================crossbrowser class adding fine============



function hideMess(obj,num){
	if(num==0)obj.className='left_top';
	obj = document.getElementById('left_mess_block');
	obj.style.display="none";
}
function openMess(obj,num){
	obj.className='left_top_active';
	obj = document.getElementById('left_mess_block');
	obj.style.display="block";
}