登录时，按回车后跳到了搜索页面

<div id="LoginFrom" style="display:none" class="Login_ajax" onkeypress="javascript:return DefaultButton(event, 'BtnLogOn')">
<SCRIPT LANGUAGE="JavaScript">
<!--

function refreshValidateCodeImage(ValidateCodeImageControl)
{
ValidateCodeImageControl.src = ValidateCodeImageControl.src '?code=' randomNum(10);
}
function randomNum(n){
var rnd='';
for(var i=0;i<n;i )
rnd =Math.floor(Math.random()*10);
return rnd;
}
function DefaultButton(event, target)
{
if (event.keyCode == 13 && !(event.srcElement && (event.srcElement.tagName.toLowerCase() == "textarea")))
{
var defaultButton = document.getElementById(target);
if (defaultButton && typeof(defaultButton.click) != "undefined")
{
defaultButton.click();
event.cancelBubble = true;
if (event.stopPropagation) event.stopPropagation();
return false;
}
}
return true;
}

//-->
</SCRIPT>