var ajax = new Array();

function getCityList(sel)
{

	var countryCode = sel.options[sel.selectedIndex].value;
	document.getElementById('model').options.length = 0;	// Empty city select box
	if(countryCode.length>0){
		var index = ajax.length;
		ajax[index] = new sack();
	//	alert("Checking"+countryCode);		
		ajax[index].requestFile = 'http://www.tweetauto.com/getcities.php?countryCode='+countryCode;	// Specifying which file to get
		ajax[index].onCompletion = function(){ createCities(index) };	// Specify function that will be executed after file has been found
			
		ajax[index].runAJAX();		// Execute AJAX function
	}
}

function createCities(index)
{
	var obj = document.getElementById('model');
		
	eval(ajax[index].response);	// Executing the response from Ajax as Javascript code	
}


function getSubCategoryList(sel)
{
	var category = sel.options[sel.selectedIndex].value;
	document.getElementById('dhtmlgoodies_subcategory').options.length = 0;	// Empty city select box
	if(category.length>0){
		var index = ajax.length;
		ajax[index] = new sack();
		
		ajax[index].requestFile = 'getcities.php?category='+category;	// Specifying which file to get
		ajax[index].onCompletion = function(){ createSubCategories(index) };	// Specify function that will be executed after file has been found
		ajax[index].runAJAX();		// Execute AJAX function
	}
}
function createSubCategories(index)
{
	var obj = document.getElementById('dhtmlgoodies_subcategory');
	eval(ajax[index].response);	// Executing the response from Ajax as Javascript code	
}		

function isNumeric(elem){
	var numericExpression = /^[0-9]+$/;
	//alert(helperMsg);
	if(elem.value.match(numericExpression)){
		//alert('data ok');
		return true;
	}else{
	//	alert(helperMsg);
		elem.focus();
		return false;
	}
}


function validate_required(field,alerttxt)
{
	with (field) {
	  if (value==null||value=="" || value.length !=5 || false==isNumeric(field) ) {
		alert(alerttxt);return false;
	  }
	  else {
		return true;
	  }
	}
}

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(zipcode,"Please enter a valid Zip Code")==false)
  {zipcode.focus();return false;}
  }
}