// JavaScript Document

//cat bo hai dau khoang trang
function trim(val)
{ 
	return val.replace(/^\s+|\s+$/g, '');
}

function StripPHP( str )
{
	str = trim(str);
	str = str.replace(/<\?php/g, '');
	str = str.replace(/<\?/g, '');
	str = str.replace(/\?>/g, '');
	
	str = str.replace(/<script>/g, '');
	str = str.replace(/<script/g, '');
	str = str.replace(/<\/script>/g, '');
	
	return str;
}

//kiem tra so va khong co cac ky tu khac
function CheckNumber(stringIn) 
{
     retval = false;
     var i;
     for (i=0;i<=stringIn.length-1;i++)
	 {
         if ((stringIn.charCodeAt(i) >= 48) && (stringIn.charCodeAt(i) <= 57))
		 {
           	retval = true;
         }
		 else
		 {
			retval = false;
			break;
         }
     }
     return retval;
}

function checkUrl(stringIn)
{
	var res = /^(((http|https):\/\/)|([w]{3}.))+[.a-z0-9]{2,}(\.[a-z]{2,3}){0,1}(\.[a-zA-Z]{2,3})([`~,!@#$%^&*()+=:;‘“<>?|\\]{0})(\/{0,1})$/i;
	
	if (stringIn.search(res) == -1)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function CheckEmail(stringIn)
{
	var re = /^([A-Za-z0-9\_\-]+\.)*[A-Za-z0-9\_\-]+@[A-Za-z0-9\_\-]+(\.[A-Za-z0-9\_\-]+)+$/;
	if (stringIn.search(re) == -1)
	{
		return false;
	}
	else
	{
		return true;
	}
}