function openwindow(winurl,winname,winparams)
	{
		window.open(winurl,winname,winparams).focus();
	}
	
	function turnOn(imageName) {
		if (document.images) {
			document.images[imageName].src = eval(imageName + '_on.src');
		}
	}

	function turnOff(imageName) {
		if (document.images) {
			document.images[imageName].src = eval(imageName + '.src');
		}
	}		
	
	function swapImage(imageName, path) {
		if (document.images) {
			document.images[imageName].src = path;
		}
	}		
			
	function preloadImages() { 
  		var d = document; 
  
		  if(d.images){ 
		  	if(!d.MM_p) 
				d.MM_p = new Array();
				
		    var i,j = d.MM_p.length,a=preloadImages.arguments; 
			
			for(i=0; i<a.length; i++)
		    	if (a[i].indexOf("#")!=0){
					d.MM_p[j]=new Image; 
					d.MM_p[j++].src=a[i];
				}
			}
		}