function   checkpercent(source)   {   
  return(/^(-|\+)?\d{1,3}(\.\d+)?%$/.test(source));  
  }
  
function checkall(form) {
	for(var i = 0;i < form.elements.length; i++) {
		var e = form.elements[i];
		if (e.name != 'chkall' && e.disabled != true) {
			e.checked = form.chkall.checked;
		}
	}
}

function isDateTime(str)
{
	var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/;
	var r = str.match(reg); 
	if(r==null)
	{
		//alert('输入的信息不是时间格式（YYYY-MM-DD HH:MM:SS）'); 
		return false;
	}
	var d= new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]); 
	return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]&&d.getHours()==r[5]&&d.getMinutes()==r[6]&&d.getSeconds()==r[7]);
}
function  IsNumber(name)  //数值检测
{  
if(name.length  ==  0)
return  false;
for(i  =  0;  i  <  name.length;  i++)  {  
if(name.charAt(i)  <  "0"  ||  name.charAt(i)  >  "9")
return  false;
}
return  true;
}

function checkspace(checkstr){ //判断是否为的函数
var str='';
for(var i=0;i<checkstr.length;i++){
str=str+' ';
}
return (str==checkstr);
}

function ismail(email)//检测email格式 
{
	return(new RegExp(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/).test(email));
}
function  isPhone(String) //检测电话号码格式
{  
var  Letters  =  "1234567890-";  //可以自己增加可输入值
var  i;
var  c;
if(String.charAt(  0  )=='-')
return  false;
if(  String.charAt(  String.length  -  1  )  ==  '-'  )
return  false;
for(  i  =  0;  i  <  String.length;  i  ++  )
{  
c  =  String.charAt(  i  );
if  (Letters.indexOf(  c  )  <  0)
return  false;
}
return  true;
}

function getCookieVal(offset)
{
	var endstr = document.cookie.indexOf(";", offset);
	if(endstr == -1)
	{
		endstr = document.cookie.length;
	}
	return unescape(document.cookie.substring(offset, endstr));
}

function getCookie(name)
{
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while(i < clen)
	{
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		{
			return getCookieVal(j);
		}
		i = document.cookie.indexOf(" ", i) + 1;
		if(i == 0) break;
	}
	return;
}