function stopCopy(){
var sUserAgent=navigator.userAgent;
var isIE=sUserAgent.indexOf("compatible")>-1&&sUserAgent.indexOf("MSIE")>-1;
var e ="";
var target="";
if(isIE){
e= window.event;
target=e.srcElement;
}else{
e=arguments[0];
target=e.target;
}
var k = e.keyCode;
if(e.ctrlKey&&k==67&& target.type!="textarea" && target.type!="text")
{
//取消事件
stopEvent(e);
}
}