function traincheck()
{
if(document.frmSignUp.company.value == "")
{
	alert('请填写公司名称！');
	document.frmSignUp.company.focus();
	return false;
}
if(document.frmSignUp.contract.value=="" )
  {
	alert("联系人不能为空！");
	document.frmSignUp.contract.focus();
	return (false);
  }
  if(document.frmSignUp.tel1.value=="" )
  {
	alert("区号不能为空！");
	document.frmSignUp.tel1.focus();
	return (false);
  }
  if(document.frmSignUp.tel2.value=="" )
  {
	alert("电话不能为空！");
	document.frmSignUp.tel2.focus();
	return (false);
  }
  if(document.frmSignUp.fax.value=="" )
  {
	alert("传真不能为空！");
	document.frmSignUp.fax.focus();
	return (false);
  }
if(document.frmSignUp.email.value == "")
  {
	alert("请输入Email！");
	document.frmSignUp.email.focus();
	return (false);
  }      
if(document.frmSignUp.email.value.length!=0)
  {
    if (document.frmSignUp.email.value.charAt(0)=="." ||        
         document.frmSignUp.email.value.charAt(0)=="@"||       
         document.frmSignUp.email.value.indexOf('@', 0) == -1 || 
         document.frmSignUp.email.value.indexOf('.', 0) == -1 || 
         document.frmSignUp.email.value.lastIndexOf("@")==document.regsiter.email.value.length-1 || 
         document.frmSignUp.email.value.lastIndexOf(".")==document.regsiter.email.value.length-1)
     {
      alert("Email地址格式不正确！");
      document.frmSignUp.email.focus();
      return false;
      }
   }


if(document.frmSignUp.postcode.value=="" )
  {
	alert("邮编不能为空！");
	document.frmSignUp.postcode.focus();
	return (false);
  }

if(document.frmSignUp.address.value=="" )
  {
	alert("地址不能为空！");
	document.frmSignUp.address.focus();
	return (false);
  }
if(document.frmSignUp.total.value=="" )
  {
	alert("报名人数不能为空！");
	document.frmSignUp.total.focus();
	return (false);
  }

return true;
}
function regInput(obj, reg, inputStr)
	{
		var docSel	= document.selection.createRange()
		if (docSel.parentElement().tagName != "INPUT")	return false
		oSel = docSel.duplicate()
		oSel.text = ""
		var srcRange	= obj.createTextRange()
		oSel.setEndPoint("StartToStart", srcRange)
		var str = oSel.text + inputStr + srcRange.text.substr(oSel.text.length)
		return reg.test(str)
	}


function checkspace(checkstr) {
  var str = '';
  for(i = 0; i < checkstr.length; i++) {
    str = str + ' ';
  }
  return (str == checkstr);
}





function checkbuy(){
	if(form1.post.value==""){
	alert("请选择运货方式不能为空");
	return false;
	}
	if(
	form1.name.value==""){
	alert("联系人不能为空");
	return false;
	}
	if(form1.tel.value==""){
	alert("电话不能为空");
	return false;
	}
	if(form1.email.value==""){
	alert("电子邮件不能为空");
	return false;
	}
	if(form1.address.value==""){
	alert("联系人地址不能为空");
	return false;
	}
	if(form1.zip.value==""){
	alert("邮编不能为空");
	return false;
	}
return true;
}
function RegRepeatCheck()
{
if(document.regsiter.email.value == "")
  {
	alert("请输入用户名！");
	document.regsiter.email.focus();
	return (false);
  }      
if(document.regsiter.username.value == "")
{
	alert('请填写您的昵称！');
	document.regsiter.username.focus();
	return false;
}
if(document.regsiter.username.value.length<2 || document.regsiter.username.value.length>12 )
  {
	alert("昵称小于4位或大于20位！");
	document.regsiter.username.focus();
	return (false);
  }

if(document.regsiter.password.value=="" )
  {
	alert("密码不能为空！");
	document.regsiter.password.focus();
	return (false);
  }
if(document.regsiter.confirmpassword.value=="" )
  {
	alert("确诊密码不能为空！");
	document.regsiter.confirmpassword.focus();
	return (false);
  }
if(document.regsiter.password.value != document.regsiter.confirmpassword.value)
{
            alert('两次密码输入不一样');
           document.regsiter.password.focus();
            return (false);
}
if(document.regsiter.checkcode.value=="" )
  {
	alert("验证码不能为空！");
	document.regsiter.checkcode.focus();
	return (false);
  }
return true;
}
function checked()
{
if( (document.input.email.value == ""))
  		{
		    alert("对不起，邮件地址不能为空！");
	    	document.input.email.focus();
	    	return (false);
  		}
if(document.input.email.value.length!=0)
  {
    if (document.input.email.value.charAt(0)=="." ||        
         document.input.email.value.charAt(0)=="@"||       
         document.input.email.value.indexOf('@', 0) == -1 || 
         document.input.email.value.indexOf('.', 0) == -1 || 
         document.input.email.value.lastIndexOf("@")==document.input.email.value.length-1 || 
         document.input.email.value.lastIndexOf(".")==document.input.email.value.length-1)
     {
      alert("Email地址格式不正确！");
      document.myformreg.email.focus();
      return false;
      }
	  }
return true;}

//校验user的弹出窗口
function checkemail(value){
	window.open("./checkemail.asp?email="+value,"",'toolbar=no,directories=no,scrollbars=0,resizable=1,status=no,menubar=0,width=250,height=100');
}

function doZoom(size){
	document.getElementById('zoom').style.fontSize=size+'px';
}

<!--

function js_callpage(htmlurl) {

  var newwin=window.open(htmlurl,"homeWin","");

  newwin.focus();

  return false;

}

//-->

function Searchcheck()
{
if(document.frmSearch.tablename.value == "")
{
	alert('类别不能为空！');
	document.frmSearch.tablename.focus();
	return false;
}
if(document.frmSearch.keywords.value == "")
{
	alert('关键字不能为空！');
	document.frmSearch.keywords.focus();
	return false;
}
	return true;
}
function logincheck()
{
if(document.frmlogin.username.value == "")
{
	alert('用户名不能为空！');
	document.frmlogin.username.focus();
	return false;
}
if(document.frmlogin.password.value == "")
{
	alert('密码不能为空！');
	document.frmlogin.password.focus();
	return false;
}
if(document.frmlogin.CheckCode.value == "")
{
	alert('验证码不能为空！');
	document.frmlogin.CheckCode.focus();
	return false;
}
	return true;
}
<!-- 
var old_menu = ''; 
var old_cell = ''; 
function menuclick( submenu ,cellbar) 
{ 
if( old_menu != submenu ){ 
if( old_menu !='' ){ 
old_menu.style.display = 'none'; 
old_cell.src= 'images/22.jpg'; 
} 
submenu.style.display = 'block'; 
cellbar.src = 'images/11.jpg'; 
old_menu = submenu; 
old_cell = cellbar; 

}else{ 
submenu.style.display = 'none'; 
cellbar.src= 'images/22.jpg'; 
old_menu = ''; 
old_cell = ''; 
} 
} 
function RemoteWindow( url ) 
{ 
window.open( url, 'PreviewWin1','width=740,height=450,resizable=yes,scrollbars=yes,status=0,location=no') 
} 
function RemoteWindow2( url ) 
{ 
window.open( url, 'PreviewWin2','width=700,height=300,resizable=yes,scrollbars=yes,status=0,fullscreen=yes') 
} 
function RemoteWindow3( url ) 
{ 
window.open( url, 'sub','width=740,height=300,resizable=yes,scrollbars=yes,status=0,location=no') 
} 

function MM_preloadImages(){//v3.0 
var d=document; if(d.images){if(!d.MM_p) d.MM_p=new Array(); 
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++) 
if (a[i].indexOf("#")!=0){d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}} 
} 

function MM_findObj(n, d){//v3.0 
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length){ 
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);} 
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n]; 
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x; 
} 

function MM_nbGroup(event, grpName){//v3.0 
var i,img,nbArr,args=MM_nbGroup.arguments; 
if (event == "init" && args.length > 2){ 
if ((img = MM_findObj(args[2])) != null && !img.MM_init){ 
img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src; 
if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array(); 
nbArr[nbArr.length] = img; 
for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null){ 
if (!img.MM_up) img.MM_up = img.src; 
img.src = img.MM_dn = args[i+1]; 
nbArr[nbArr.length] = img; 
}} 
}else if (event == "over"){ 
document.MM_nbOver = nbArr = new Array(); 
for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null){ 
if (!img.MM_up) img.MM_up = img.src; 
img.src = (img.MM_dn && args[i+2]) ? args[i+2] : args[i+1]; 
nbArr[nbArr.length] = img; 
} 
}else if (event == "out" ){ 
for (i=0; i < document.MM_nbOver.length; i++){ 
img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up;} 
}else if (event == "down"){ 
if ((nbArr = document[grpName]) != null) 
for (i=0; i < nbArr.length; i++){img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0;} 
document[grpName] = nbArr = new Array(); 
for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null){ 
if (!img.MM_up) img.MM_up = img.src; 
img.src = img.MM_dn = args[i+1]; 
nbArr[nbArr.length] = img; 
}} 
}