function trim(sString)
	{
		return sString.replace(/(^\s*)|(\s*$)/g, "");
	} 


function isNumber(s) //数字判断函数
{
        var digits = "0123456789";
        var i = 0;
        var sLength = s.length;

        while ((i < sLength))
        {
                var c = s.charAt(i);
                if (digits.indexOf(c) == -1) return false;
                i++;
        }

        return true;
}
function isemail (s)//验证E-MAIL格式函数
{
        
        if (s.length > 100)
        {
                return false;
        }

         var regu = "^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[0-9a-zA-Z]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2}|net|NET|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT|biz|BIZ)$"
         var re = new RegExp(regu);
         if (s.search(re) != -1) {
               return true;
         } else {
               return false;
         }
}
//判断是否中文函数
function ischinese(s){
var ret=true;
for(var i=0;i<s.length;i++)
ret=ret && (s.charCodeAt(i)>=10000);
return ret;
}