//判断是否是URL
     function isValidURL(surl)
     {
     	var str_url = document.getElementById(surl).value;
     	var strRegex = "^((https|http|ftp|rtsp|mms)?://)" 
        + "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" //ftp的user@ 
        + "(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP形式的URL- 199.194.52.184 
        + "|" // 允许IP和DOMAIN（域名）
        + "([0-9a-z_!~*'()-]+\.)*" // 域名- www. 
        + "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // 二级域名 
        + "[a-z]{2,6})" // first level domain- .com or .museum 
        + "(:[0-9]{1,4})?" // 端口- :80 
        + "((/?)|" // a slash isn't required if there is no file name 
        + "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$"; 
        //var re=new RegExp(strRegex); 
        //re.test()
          
        if (str_url.match(strRegex)){
            return true; 
        }else{ 
            return false; 
        }
     }
     
     //判断是否是URL(简易)
     function isURL(surl)
     {
     	var str_url = document.getElementById(surl).value;
     	var strRegex = "[a-zA-z]+://[^\\s]+\\.[^\\s]+";
          
        if (str_url.match(strRegex)){
            return true; 
        }else{ 
        	document.getElementById(surl).focus();
            return false; 
        }
     }
     
    function test(){
    	alert("test OK!");
    }

    function isNull(id,paraName)
    {
        if(document.getElementById(id).value=="" || document.getElementById(id).value==null)
        {
            alert(paraName);
            document.getElementById(id).focus();
            document.getElementById(id).select();
            return false;
        }
        else return true;
    }  
    
    function isNullSelect(id,paraName)
    {
        if(document.getElementById(id).value=="" || document.getElementById(id).value==null)
        {
            alert(paraName);
            document.getElementById(id).focus();
            return false;
        }
        else return true;
    } 
    
    function spaceCheck(id,para)
    {
    	var str = document.getElementById(id).value;
    	if (str.indexOf(" ")>0)
    	{
    		alert(para);
    		document.getElementById(id).value="";
    		document.getElementById(id).focus();
    		return false;
    	}
    	else return true;
    }
    
    //textarea非空验证+长度验证
    function textareaVaild(id,paraName,length)
    {
        if(document.getElementById(id).value==null)
        {
            alert(paraName+"不能为空!");
            document.getElementById(id).focus();
            document.getElementById(id).select();
            return false;
        }else if(document.getElementById(id).value=="")
        {
        	alert(paraName+"不能为空!");
            document.getElementById(id).focus();
            document.getElementById(id).select();
            return false;
        }else if(document.getElementById(id).value.length > length)
        {
            alert("您输入的"+paraName+"内容过长!");
            document.getElementById(id).focus();
            document.getElementById(id).select();
            return false;
        }
        else return true;
    }   
    
    function textareaTooLong(id,paraName,length)
    {
        if(document.getElementById(id).value.length > length)
        {
            alert("您输入的"+paraName+"内容过长!");
            document.getElementById(id).focus();
            document.getElementById(id).select();
            return false;
        }
        else return true;
    } 
    
    function isTooLong(id,length,paraName)
    {
        if(document.getElementById(id).value.length > length)
        {
            alert(paraName);
            document.getElementById(id).value="";
            document.getElementById(id).focus();
            document.getElementById(id).focus();
            return false;
        }
        else return true;
    }
    
    //判断超长之后不清除所填入的内容
    function isTooLongKeepInfo(id,length,paraName)
    {
        if(document.getElementById(id).value.length > length)
        {
            alert(paraName);
            return false;
        }
        else return true;
    }
    
    function selAll()
    {
        var objs = document.getElementsByName("ele");
	    if (document.getElementById("checkAll").checked==true){   
           for(var i=0;i<objs.length;i++)
               objs[i].checked=true;
        }
        else
        {
           for(var i=0;i<objs.length;i++)
               objs[i].checked=false;
        }
    }
    
    function isNullMul(ele,alertName)
    {
        var isNull = false;
    	var objs = document.getElementsByName(ele);
    	for(var i=0;i<objs.length;i++)
    	{
    		if (objs[i].checked==true)
    		{
    			isNull = true;  			
    		}
    	}
    	if (!isNull)
    		alert(alertName);
    	return isNull;
    }
    
    function isEqual(fid,sid,paraName)
    {
    	var fvalue = document.getElementById(fid);
    	var svalue = document.getElementById(sid);
    	if(fvalue.value!=svalue.value){   
    	     		
    		alert(paraName);
    		fvalue.value = ""
    		svalue.value = "";
    		fvalue.focus();    		
    		return false;    	
    	}
    	else
    	{
    		return true;
    	}
    }
    
    function checkBulk()
    {
    	for (i=0;i<document.getElementsByName("ele").length;i++)
        if (document.getElementsByName("ele")[i].checked)
        	return true;
        alert("请选择需要操作的对象！")
        return false;
    }
    
    function validateDig(id,word)
    {  
    	var code = document.getElementById(id).value;
    	var parser = /^[0-9]+$/
    	if (!parser.test(code))
    	{
    		alert(word); 
    	    return false;
    	}
    	else return true;   
     }
     
     ////验证输入是否是数字
     function validateNum(num)
     {
     	var code = num;
     	var parser = /^[0-9]+$/
     	if (!parser.test(code))
    	{
    	    return false;
    	}
    	else return true; 
     }
    
     //验证Email地址
     function isEmail(id){
     	var emailTest = document.getElementById(id);
     	var ExgEmail = /^(.+)@(.+)$/;
     	var flagEmail = emailTest.value.match(ExgEmail);
     	if(flagEmail==null){
     		alert("您输入的Email地址无效");
     		document.getElementById(id).value="";
     		emailTest.focus();
     		return false;
     	}else{	
     		return true;
     	}
     }
     
     //判断结束时间是否晚于开始时间
     function yearValidation(start,end)
     {
     	var startTime = document.getElementById(start).value;
     	var endTime = document.getElementById(end).value;
     	var timeS = startTime.substring(0,4)+startTime.substring(5,7)+startTime.substring(8,10);
     	var timeE = endTime.substring(0,4)+endTime.substring(5,7)+endTime.substring(8,10);
     	if (timeE<timeS)
     	{
     		alert("你输入的开始日期不能晚于结束日期");
     		return false;
     	}
     	else return true;
     }