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 == 'over') {
			var src = aImages[i].getAttribute('src');
			var hsrc = src.replace("_off.", "_on.");

			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("src").replace("_off.", "_on."));
    		}
    
    		aImages[i].onmouseout = function() {
    			if (sTempSrc){
    				this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
    			}
    		}
		
		}
	}
}


if (window.addEventListener) {  /* Firefox,Safari,Opera */  
    window.addEventListener("load", initRollovers, false);  
}   
 else if (window.attachEvent) {  /* IE4, IE5, IE6, IE7 */  
     window.attachEvent("onload", initRollovers);  
}      
 else if (document.getElementById || document.all) { /* ‚»‚Ì‘¼DOM�€‹’ */  
     window.onload = initRollovers;  
}