function winOpen(img,w,h){
	var LeftPosition = (screen.width)? (screen.width-w)/2 : 0; 
	var TopPosition = (screen.height)? (screen.height-h)/2 - 20 : 0; 
	var winn=",left="+LeftPosition+",top="+TopPosition;
	
	myWin=window.open(img,"winName","width="+w+",height="+h+",status=no,toolbar=no,menubar=no,scrollbars=yes"+winn);
	//myWin.document.open();
//	myWin.document.write("<img src=\""+f+"\" width="+(ff-10)+" border=0 onclick=\"self.close();\" alt=\"Click on the image to close the window\" style=\"cursor:hand\">");
	
	 return true; 
}

//check login form
function check_login_form(f){
	if(!f.username.value || !f.password.value){	
		alert('Потребителското име и паролата не може да са празни!');
		return false;
	}
}

//load all products of particular manufacturer
function load_manufacturer(sel)
{
	if(sel.selectedIndex)
		document.location = 'products.php?manufacturer='+sel.options[sel.selectedIndex].value	
}

/*
var d = document;

function $(id)
{
  return d.getElementById(id);
}

function hideShow(id) {
 if($(id))
    $(id).style.display =($(id).style.display=='')?'none':'';
}


function hide(id) {
 if($(id))
    $(id).style.display = 'none';
}

function show(id) {
 if($(id))
    $(id).style.display = 'block';
}
*/

function hideShow(id) {
	if( $('#'+id).is(":visible") ){
		$('#'+id).hide();	
	}else{
		$('#'+id).show();
	}
}

function selectTab (newTabId, oldTabId, selTabNum){
	  newTab = $('#'+newTabId);
	  
	  if (newTabId == "n2") {
	  	$(newTab).attr('class',$(newTab).attr('class')+" seln2"); 
	  }else{
	  	$(newTab).attr('class',$(newTab).attr('class')+" sel"); 
	  }
	  
	  if (oldTabId) {
	    oldTab = $('#'+oldTabId);
	    $(oldTab).attr('class', $(oldTab).attr('class').substring(0,$(oldTab).attr('class').length-4) );
	    hideShow (oldTabId+'child');
	  }
	  hideShow (newTabId+'child');
	  
	  switch(selTabNum) 
	  {
	    case 1:
	      selTab1 = newTabId;
	      break;    
	    case 2:
	      selTab2 = newTabId;
	      break;
	    case 3:
	      selTab3 = newTabId;
	      break;
	    case 4:
	      selTab4 = newTabId;
	      break;
	    case 5:
	      selTab5 = newTabId;
	      break;
	    case 6:
	      selTab6 = newTabId;
	      break;
	    case 7:
	      selTab7 = newTabId;
	      break;
	    case 8:
	      selTab8 = newTabId;
	      break;
	    case 9:
	      selTab9 = newTabId;
	      break;
	    default:
	    case 10:
	      selTab10 = newTabId;
	      break;
	  }
}

/*
function selectTab (newTabId, oldTabId, selTabNum)
{
	  newTab = $(newTabId);
	  
	  if (newTabId == "n2") 
	  {
	  	newTab.className += " seln2"; 
	  }
	  else
	  {
	  	newTab.className += " sel"; 
	  }
	  
	  if (oldTabId) {
	    oldTab = $(oldTabId);
	    oldTab.className = oldTab.className.substring(0,oldTab.className.length-4);
	    hideShow (oldTabId+'child');
	  }
	  hideShow (newTabId+'child');
	  
	  switch(selTabNum) 
	  {
	    case 1:
	      selTab1 = newTabId;
	      break;    
	    case 2:
	      selTab2 = newTabId;
	      break;
	    case 3:
	      selTab3 = newTabId;
	      break;
	    case 4:
	      selTab4 = newTabId;
	      break;
	    case 5:
	      selTab5 = newTabId;
	      break;
	    case 6:
	      selTab6 = newTabId;
	      break;
	    case 7:
	      selTab7 = newTabId;
	      break;
	    case 8:
	      selTab8 = newTabId;
	      break;
	    case 9:
	      selTab9 = newTabId;
	      break;
	    default:
	    case 10:
	      selTab10 = newTabId;
	      break;
	  }
}
*/

function Wopen (windowName, URL, targetName, windowWidth, windowHeight, windowFeatures)	
{
  windowWidth += 50; 
	str = 'width=' + windowWidth + ',height=' + windowHeight;
	str = str + ",";
	str = str + "left=" + (screen.width / 2 - windowWidth / 2) + ",top=" + (screen.height / 2 - windowHeight / 2 - 40);
	if (windowFeatures != null)
		str = str + ",";
	windowFeatures = str + windowFeatures;
	eval(windowName + "=window.open('" + URL + "','" + targetName + "','" + windowFeatures + "')");
}

function roll_over(img_name, img_src)
{
	document[img_name].src = img_src;
}


function disableSelection(target){
	if (typeof target.onselectstart!="undefined"){ //IE route
		target.onselectstart=function(){return false}
	}else if (typeof target.style.MozUserSelect!="undefined"){ //Firefox route
		target.style.MozUserSelect="none";
	}else{ //All other route (ie: Opera)
		alert('else');
		target.onmousedown=function(){return false}
	}
	target.style.cursor = "default"
}