// JavaScript Document
function check()
{
	if(document.swap_link.link_name.value == '')
	{
		alert("Please Enter Link Name");
		document.swap_link.link_name.focus();
		return false;
	}
	
	if(document.swap_link.link_email.value == '')
	{
		alert("Please Enter E-Mail Adderss");
		document.swap_link.link_email.focus();
		return false;
	}
	if(!checkMail(document.swap_link.link_email.value))
	{
		alert("Please Enter Valid Email Address");
		document.swap_link.link_email.focus();
		document.swap_link.link_email.value="";
		return false;		
	}
	
	if(document.swap_link.link_title.value == '')
	{
		alert("Please Enter Link Title");
		document.swap_link.link_title.focus();
		return false;
	}
	
	if(document.swap_link.link_desc.value == '')
	{
		alert("Please Enter Link Description");
		document.swap_link.link_desc.focus();
		return false;
	}
	
	if(document.swap_link.link_url.value == '')
	{
		alert("Please Enter Link URL");
		document.swap_link.link_url.focus();
		return false;
	}
	
	if(document.swap_link.page_url.value == '')
	{
		alert("Please Enter Page URL");
		document.swap_link.page_url.focus();
		return false;
	}
		
}
function checkMail(email)
{
		var x = email;
		var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (filter.test(x)){
			return true;
		}
		else {
			return false;
		}
}