function menuLink(obj, state){

		switch(state){

		case "over" :
			for(x=0;x<obj.childNodes.length;x++){
				if(obj.childNodes[x].tagName=="IMG"){
					obj.childNodes[x].src=eval(obj.childNodes[x].id + "img.imgover.src");
				}
			}
			break;
		default :
			for(x=0;x<obj.childNodes.length;x++){
				if(obj.childNodes[x].tagName=="IMG"){
					obj.childNodes[x].src=eval(obj.childNodes[x].id + "img.imgoff.src");
				}
			}
			break;
	}
}
function rollover(imgoff,imgover){
	this.imgoff=new Image;
	this.imgoff.src=imgoff;
	this.imgover=new Image;
	this.imgover.src=imgover;
}
menu1img=new rollover("images/ui_home_off.png","images/ui_home_on.png");
menu2img=new rollover("images/ui_academic_off.png","images/ui_academic_on.png");
menu3img=new rollover("images/ui_conferences_off.png","images/ui_conferences_on.png");
menu4img=new rollover("images/ui_theses_off.png","images/ui_theses_on.png");
menu5img=new rollover("images/ui_publications_off.png","images/ui_publications_on.png");
menu6img=new rollover("images/ui_about_off.png","images/ui_about_on.png");
menu7img=new rollover("images/ui_press_off.png","images/ui_press_on.png");
menu8img=new rollover("images/ui_login_off.png","images/ui_login_on.png");
menu9img=new rollover("images/ui_fsresources_off.png","images/ui_fsresources_on.png");
menu10img=new rollover("images/ui_alumni_off.png","images/ui_alumni_on.png");
menu11img=new rollover("images/ui_presources_off.png","images/ui_presources_on.png");
menu12img=new rollover("images/ui_resources_off.png","images/ui_resources_on.png");
menu20img=new rollover("images/ui_chds_off.png","images/ui_chds_on.png");
menu21img=new rollover("images/ui_hsdl_off.png","images/ui_hsdl_on.png");