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 

//½ûֹѡÖдúÂë
document.oncontextmenu=new Function("event.returnValue=false;");
document.onselectstart=new Function("event.returnValue=false;");


function openwin() {
	window.open ("newyear.html", "newwindow", "height=400, width=450, toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, status=no");
}