function doPreview() {
   

   if(  document.getElementById('adcategory').options.selectedIndex == 0 ) {
	  
	       alert('Select ad category');
				 
				 document.getElementById('adcategory').focus();
				 
				 return false;
	 }


	 var c = document.getElementById('headlinetype2');
   if(  c.checked == true ) {
	  
       loob = true;
	 }	 


	 var c = document.getElementById('headlinetype3');
   if(  c.checked == true ) {
	  
       loob = true;
	 }
	 


	 if(loob == false ) {

	 
	       alert('Select headline type');
				 
				 c.focus();
				 
				 return false;	 
	 
	 
	 
	 }
	 
	 if( !document.getElementById('adcopy').value ) {
	 
	 
	       alert("Enter ad description");
				 
				 document.getElementById('adcopy').focus();     
				 
				 return false;
	 
	 }
	 
	 
   var adlength = document.getElementById('adlength');

	
   if(  adlength.options.selectedIndex == 0 )  {
	
	       alert('Select ad duration');
				 
				 adlength.focus();
				 
				 return false;	
	
	
	}
	
	 
	btn = document.getElementById("form_btn");
	btn.innerHTML = "<img src='gfx/loadingAnim.gif'> Uploading...";
	
	 return true;
}

function swapBold(which) {
	var maxObj = document.getElementById("headline");
	if(which == "ebold") len=20;
	else len=25;
	maxObj.setAttribute('maxlength', len);
	maxObj.value = maxObj.value.substring(0,len);
	updateSubtotal();
}

function updateSubtotal() {
	bold_default = parseInt(document.getElementById("bold_default").value);
	color_default = parseInt(document.getElementById("color_default").value);
	link_default = parseInt(document.getElementById("link_default").value);
	img_default = parseInt(document.getElementById("img_default").value);
	video_default = parseInt(document.getElementById("video_default").value);
	var baseprice = 15;
	if(document.getElementById("headlinetype3").checked) boldprice = bold_default; //extra bold $1
	else boldprice = 0;
	if(document.getElementById("headlinecolor").checked) colorprice = color_default; // color $1
	else colorprice = 0;
	if(document.getElementById("addlink").checked) linkprice = link_default; // link $5
	else linkprice = 0;
	if(document.getElementById("image_main").value.length > 0 || (document.getElementById("keepimg") && document.getElementById("keepimg").checked)) imgprice = img_default; // image $5
	else imgprice = 0;
	if(document.getElementById("video").value.length > 0 || (document.getElementById("keepvideo") && document.getElementById("keepvideo").checked)) vidprice = video_default; // $5
	else vidprice = 0;
	
	var weeks = document.getElementById("adlength");
	w = weeks.options[weeks.selectedIndex].value;
	
	total = (baseprice + boldprice + colorprice + linkprice + imgprice + vidprice) * w;
	document.getElementById("subtotal_txt").innerHTML = "Subtotal: <u>&nbsp;&nbsp;$"+total+".00&nbsp;&nbsp;</u>";
	document.getElementById("subtotal").value = total;
}



/***********************************************
* Textarea Maxlength script- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

function ismaxlength(obj){
var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : ""
if (obj.getAttribute && obj.value.length>mlength)
obj.value=obj.value.substring(0,mlength)
}