var vDoRo=false;
var browserN=false;
var browserIE=false;
var browserW3C=false;

if (document.layers) {
	browserN=true; // netscape4-esque
} else if (document.all) {
	browserIE=true; // ie4-5-esque
} else if (document.getElementById) {
	browserW3C=true; // w3c-compliant-esque
}

function imgOver( argImgName ){
	if( (argImgName!=vCurrPageTop) && vDoRo ){
		if( vArBtns[argImgName].over.loaded ){ //if the OVER state of that button is loaded
			document[argImgName].src = vArBtns[argImgName].over.src;
		}
	}
}
		
function imgOut( argImgName ){
	if( (argImgName!=vCurrPageTop) && vDoRo ){
		document[argImgName].src = vArBtns[argImgName].off.src;
	}
}

function txtOver(){this.style.color="#f30";}
function txtOut(){this.style.color="";}

//this hack is necessary since NS6 PC has a problem with the predefined image object's complete property
function fImgLoaded(){this.loaded=true;}

function fLoaded(){
	if( document.images ){
		vArBtns = new Object();
		for(i=0; i<document.images.length; i++){
			if( document.images[i].name ){ //if that image has a NAME, we assume it has a rollover effect
				var vSrc = new String(document.images[i].src);
				var vIndexDot = vSrc.lastIndexOf(".");
				if(document.images[i].name == vCurrPageTop){
					document.images[i].src = vSrc.slice(0,vIndexDot) + "_curr" + vSrc.slice(vIndexDot);
				}else{
					vArBtns[document.images[i].name] = new Object();
					vArBtns[document.images[i].name].off = new Image();
					vArBtns[document.images[i].name].off.src = vSrc;

					vArBtns[document.images[i].name].over = new Image();
					vArBtns[document.images[i].name].over.loaded=false;
					vArBtns[document.images[i].name].over.onload=fImgLoaded;
					vArBtns[document.images[i].name].over.src = vSrc.slice(0,vIndexDot) + "_over" + vSrc.slice(vIndexDot);
				}
			}
		}
		vDoRo=true;
	}

	if(!browserN){
		//the text rollover effect
		var arLinks=document.getElementsByTagName("a");
		for(var i=0; i<arLinks.length; i++){
			if(!arLinks[i].onmouseover){
				arLinks[i].onmouseover=txtOver;
				arLinks[i].onmouseout=txtOut;
			}
		}
		
		//netscape4 poorly supports this style so we dynamically apply it to everybody else
		document.forms.searchform["q"].style.borderWidth = "1px";
	}
}