//验证数字
function isNumber(num)
{   
    var number = "1234567890";
    var temp;
    for (var i = 0; i < num.length; i++ )
    {
        temp = num.substring(i,i+1);
        if (number.indexOf(temp) == -1)
        {
        return (false);
        }
    }
}


function check(form)
{
	
//验证Page

   if (form.Page.value=="")
    {
        alert("\n请您输入跳转页！");
        form.Page.focus();        
        return (false);
    }
    if (isNumber(form.Page.value) == false)
    {
        alert("跳转页输入不正确！\n\n跳转页必须为数字！");
        form.Page.focus();        
        return (false);
    } 
    
}