function ValidateCategoryForm()
  {
  if (document.productCategory.categorytitle.value == "" || document.productCategory.categorytitle.value == null)
	{
	alert("Please enter a category name.");
	document.productCategory.categorytitle.select();
	document.productCategory.categorytitle.focus();
	return false;
	}	     
  }

function ValidateNewProduct()
  {
  if (document.addproduct.producttitle.value == "" || document.addproduct.producttitle.value == null)
	{
	alert("Please enter a product name.");
	return false;
	}
	
	if (document.addproduct.description.value == "" || document.addproduct.description.value == null)
	{
	alert("Please enter a product description.");
	return false;
	}
	
	if (document.addproduct.product_price.value == "" || document.addproduct.product_price.value == null)
	{
	alert("Please enter a product price.");
	return false;
	}
	
	     
  }
  
var popbackground="white" //specify backcolor or background image for pop window
var windowtitle="Image Window"  //pop window title

function detectexist(obj){
return (typeof obj !="undefined")
}

function jkpopimage(imgpath, popwidth, popheight, textdescription){

function getpos(){
leftpos=(detectexist(window.screenLeft))? screenLeft+document.body.clientWidth/2-popwidth/2 : detectexist(window.screenX)? screenX+innerWidth/2-popwidth/2 : 0
toppos=(detectexist(window.screenTop))? screenTop+document.body.clientHeight/2-popheight/2 : detectexist(window.screenY)? screenY+innerHeight/2-popheight/2 : 0
if (window.opera){
leftpos-=screenLeft
toppos-=screenTop
}
}

getpos()
var winattributes='width='+popwidth+',height='+popheight+',resizable=yes,left='+leftpos+',top='+toppos
var bodyattribute=(popbackground.indexOf(".")!=-1)? 'background="'+popbackground+'"' : 'bgcolor="'+popbackground+'"'
if (typeof jkpopwin=="undefined" || jkpopwin.closed)
jkpopwin=window.open("","",winattributes)
else{
//getpos() //uncomment these 2 lines if you wish subsequent popups to be centered too
//jkpopwin.moveTo(leftpos, toppos)
jkpopwin.resizeTo(popwidth, popheight+30)
}
jkpopwin.document.open()
jkpopwin.document.write('<html><title>'+windowtitle+'</title><body '+bodyattribute+'><img src="'+imgpath+'" style="margin-bottom: 0.5em"><br />'+textdescription+'</body></html>')
jkpopwin.document.close()
jkpopwin.focus()
}

