//打开一个新窗口
function newwindow(mypage,w,h){
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h-40)/2 : 0;
	settings ='height='+h+', width='+w+', top='+TopPosition+', left='+LeftPosition+',toolbar=no, menubar=no, scrollbars=yes, resizable=no, location=no, status=no'
	var windowinfo=window.open(mypage,'',settings);
	windowinfo.focus();
}

//全选
function CheckAll(form)
  {
  for (var i=0;i<form.elements.length;i++)
    {
    var e = form.elements[i];
    if (e.name != 'chkall')
       e.checked = form.chkall.checked;
    }
  } 

//删除选中的复选框（form中需要有一个hidType包含复选框信息）
  function deleteData(f)
	{	
		if (isselected(f))
		 {
		   var isdelete;
		   isdelete=confirm('确定删除所选记录?');
		   if(isdelete)
			 {
			   f.hidType.value="delete"
			   f.submit()	  
		     }
		   else
             return false;
		 }
		else
         {
		  alert('请选择要删除的记录！');
		  return false;
		 }
   }

function isselected(f){
	for (i=0;i<f.elements.length;i++)
		if (f.elements[i].checked) return true;
		return false;
	}

//是否电子邮件地址
function isEmailId(str)
{
	/*****************************************************************
	Input   :  str
	purpose :  To validate for email
	output  :  valid email true/false
	*******************************************************************/
	var objRegExp  = /^[a-z0-9]([a-z0-9_\-\.]*)@([a-z0-9_\-\.]*)(\.[a-z]{2,3}(\.[a-z]{2}){0,2})$/i;
	return objRegExp.test(str);
}