//window.onerror = killErrors;
function changeTab(n){
    //tab个数
    var len=4;
    for(i=1;i<=len;i++){
   	    document.getElementById("tab_"+i).style.display=(i==n)?"block":"none";
 if (i==n)
	    document.getElementById("img"+i).src="/Images/product/w0520_0"+i+".gif";
	    else 
	    document.getElementById("img"+i).src="/Images/product/w0120_0"+i+".gif";
    }
}

var timeout; 
function delayChangeTab(m,n){
    timeout = setTimeout("changeTab("+m+")",n);
}

function cancelChangeTab(){
    clearTimeout(timeout);
}
 function EnterTextBox(tn)
   {
//   alert(event.keyCode );
    if(event.keyCode == 13 )
    {
     event.keyCode = 9;
     event.returnValue = false;
 var obj= document.getElementById (tn);
 if(obj!=null)
obj .click();
    }
   }