function doZoom(size){
		var artibody = document.getElementById('artibody');
		if(!artibody){
			return;
		}
		var artibodyChild = artibody.childNodes;
		artibody.style.fontSize = size + 'px';
		for(var i = 0; i < artibodyChild.length; i++){
			if(artibodyChild[i].nodeType == 1){
				artibodyChild[i].style.fontSize = size + 'px';
			}
		}		
	}
	function openScript(url, width, height) {
	        var Win = window.open(url,"openScript",'width=' + width + ',height=' + height + ',resizable=1,scrollbars=yes,menubar=no,status=no' );
	}
	function check() {
		if (epra.user_name.value == "")
		{
			alert("用户名不可为空");
			epra.user_name.focus();
			return ;
		}
	
		if (epra.user_password.value == "")
		{
			alert("密码不可为空");
			epra.user_passwrod.focus();
			return ;
		}
	
		epra.user_name.value = epra.user_name.value;
		epra.user_password.value = epra.user_password.value;
		epra.submit();
	}