if (window.Event) 
	{
		document.captureEvents(Event.MOUSEUP); 
	}
	function nocontextmenu() 
	{
		event.cancelBubble = true;
		event.returnValue = false;
		return false;
	}

	function norightclick(e) 
	{
		//if (window.Event) 
		//{
		//if (e.which == 2 || e.which == 3)
		//	return false;
		//}
		//else
		//if (event.button == 2 || event.button == 3)
		//{
		//	event.cancelBubble = true;
		//	event.returnValue = false;
		//	return false;
		//}
	}
	//document.oncontextmenu = nocontextmenu; // for IE5+
	//document.onmousedown = norightclick; // for all others

	//控制多行文本框字符个数
	function checkTextLength(obj,length)   
	{   
		if(obj   ==   null)   
		{   
			window.alert("脚本错误，参数不正确");   
			//用法：<asp:textbox onkeypress="checkTextLength(this,30);" onblur="checkTextLength(this,30);" TextMode="MultiLine">   
		}   
		else   
		{   
			if(obj.value.length>length-1)   
			{   
				if(event.keyCode==0)   
					window.alert("输入的字符过长，超出部分将自动截断！");   
				obj.value = obj.value.substring(0,length-1);   
			}   
		}               
	}