// Rollover functions
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
	function preloadImages() {
		if (document.images) {
			nav_contactus_on = newImage("images/nav_contactus-on.gif");
			nav_clinicaltrials_on = newImage("images/nav_clinicaltrials-on.gif");
			nav_tdp_on = newImage("images/nav_tdp-on.gif");
			nav_investorrel_on = newImage("images/nav_investorrel-on.gif");
			nav_contactus_on = newImage("images/nav_contactus-on.gif");
			nav_corporate_on = newImage("images/nav_corporon.gif");				
			preloadFlag = true;
		}
	}
	
	function changeURL(){
      var URL = document.change.url.options[document.change.url.selectedIndex].value;
      window.location.href = URL;
	}