function search_form_valid()
{
	var f = document.search_form;
	var str = f.key.value;
	var chk1 = str.indexOf("http://");
	var chk2 = str.indexOf(".");
	//alert(chk1+" "+chk2);
	if (chk1 != -1 || chk2 != -1)
	{
		if((/^http\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?$/).exec(str)==null)
		{
			alert( "Please Provide Proper Url" );
			f.key.focus();
			return false;
		}
		else
		{
			f.type.value = "url";
			return true;
		}
	}
	else
	{
		if(str.search(/\S/) == -1 || str == "search by keyword, city, country, URL")
		{
			alert( "Please Provide The Search string" );
			f.key.focus();
			return false;
		}
		else
		{
			f.type.value = "text";
			return true;
		}
	}	
}
function clearsubmitall()
{
	if(document.search_form.key.value=="search by keyword, city, country, URL")
	{
	document.search_form.key.value = "";
	}
}