// JavaScript Document
function sousuo() {	
	if (document.sss1.k.value == "") {
		alert('请输入要查找的内容！');
		return false;
		}
		document.sss1.submit();	
		return true;
	}
function chkmail(mails) {
	if (mails == "请输入要发送的Email地址") {
		document.forms['sendurl'].emails.value = "";		
		}
	}
function sendurls(){
	var chkstr = document.forms['sendurl'].emails.value;
	if (chkstr == "" || chkstr == "请输入要发送的Email地址"){
		document.forms['sendurl'].emails.value="";
		document.forms['sendurl'].emails.focus();
		alert('请输入Email地址');
		return false;
		}
		document.sendurl.submit();
		return true;
	}

function chkcomment(){
	var name=document.forms['zixun'].username.value;
	if (name==''){
	alert('请输入用户名!');
		return false;		
	}else
		var str =  document.forms['zixun'].useremail.value ;
		var usercomment =  document.forms['zixun'].usercomment.value ;
		CheckEmail( str );
		if(!CheckEmail( str )){
		alert('请输入正确的Email地址。');
		return false;
		}else{
		if (usercomment==''){
			alert('请输入内容！');
		}else {
			document.forms['zixun'].submit(); 
			return true;
			}
		}

	}
function Check( reg, str )
{
if( reg.test( str ) )
{
return true;
}
return false;
} 	
function CheckEmail( str )
{
var reg = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
return Check( reg, str );
}