//rollover images
function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
//drop-down menu if browser doesn't support css drop-down		   
		            if (document.all&&document.getElementById) {
		            navRoot = document.getElementById("nav");
		            if ( navRoot ) {
		            for (i=0; i<navRoot.childNodes.length; i++) {
			            node = navRoot.childNodes[i];
			            if (node.nodeName=="LI") {
				            node.onmouseover=function() {
					            this.className+=" over";
                           if(document.getElementById("menu_iframe")) {
                               var iframe = document.getElementById("menu_iframe");

                               var submenu = this.getElementsByTagName("UL");
                               if(submenu.length) {
                                  iframe.style.top = submenu[0].offsetTop + this.offsetTop;
                                  iframe.style.left = submenu[0].offsetLeft + this.offsetLeft;
                                  iframe.style.width = submenu[0].scrollWidth;
                                  iframe.style.height = submenu[0].clientHeight;
                                  iframe.style.display = "inline";
                               }
                            }
				            }
				            node.onmouseout=function() {
					            this.className=this.className.replace(" over", "");
                           if(document.getElementById("menu_iframe")) {
                              var iframe = document.getElementById("menu_iframe");
                              iframe.style.display = "none";
                           }
				            }
			            }
		            }
		            }
	            }
}

window.onload=initRollovers;