//
function  onlynum(textField)
{
    if(textField.value!=''&&isNaN (textField.value))
   {
   	alert("只能输入数字!");
   	textField.focus();
   }
}
//
function IP2V(textField)
{
        var re = /(\d+)\.(\d+)\.(\d+)\.(\d+)/;   //
        var re2 = /(\s)/;

        str = textField.value.toString();
        if (str.match(re) && str) //
        {
        	if(RegExp.$1>255 || RegExp.$2>255 || RegExp.$3>255 || RegExp.$4>255)//
                {
                    alert("IP地址格式不正确!");
                    textField.focus();
                }
        }
        else if(str!="")//
        {
        	alert("IP地址不能为空!");
                textField.focus();
        }
}

//
function  ifonlynum(textField)
{
    if(textField.value!=''&&isNaN (textField.value))
   {
   		textField.focus();
        return false;
   }
   return true;
}

function  getTodayString()
{
    var today = new Date();
	return today.getYear()+"年"+(today.getMonth()+1)+"月"+today.getDate()+"日 "+today.getHours()+":"+today.getMinutes()+":"+today.getSeconds()+"  星期"+"日一二三四五六".charAt(today.getDay()); 
}