var img = new Array();

function preload_img() {
	p_img("/common/images/hd_nv01_on.gif");
	p_img("/common/images/hd_nv02_on.gif");
	p_img("/common/images/hd_nv03_on.gif");
	p_img("/common/images/hd_btn01_on.gif");
	p_img("/common/images/hd_btn02_on.gif");
	p_img("/common/images/hd_btn03_on.gif");
	p_img("/common/images/pt_btn_on.gif");
	p_img("/common/images/ft_btn01_on.gif");
	p_img("/common/images/ft_btn01_on.gif");
	p_img("/broadcast/images/iproduct_btn01_on.gif");
	p_img("/broadcast/images/iproduct_btn02_on.gif");
	p_img("/broadcast/images/iproduct_btn03_on.gif");
	p_img("/company/images/index_btn01_on.gif");
	p_img("/company/images/index_btn02_on.gif");
	p_img("/company/images/index_btn03_on.gif");
	p_img("/company/images/index_btn04_on.gif");
	p_img("/recruit/images/index_btn01_on.gif");
	p_img("/recruit/images/index_btn02_on.gif");
}

function p_img(imgName){
	img[imgName] = new Image();
	img[imgName].src = imgName;
}

function ImgRollover(imgName,imgSrc) {
	document.images[imgName].src = imgSrc;
}


function rollOverImages() {
	var tagArray = document.getElementsByTagName('*');
	
	for(var n=0; len=tagArray.length,n<len; n++) {
		var node = tagArray[n];
		if(node.className=='rollover') {
			node.originalSrc = node.src;
			node.temporarySrc = node.originalSrc.replace(/_off/,'');
			node.rolloverSrc = node.temporarySrc.replace(/(\.gif|\.jpg|\.png)/,'_on'+"$1");
			//Start Preload Images
			preloadOverImage(node.rolloverSrc);
			//Mouseover
			node.onmouseover = function() {
				this.src = this.rolloverSrc;
			}
			//Mouseout
			node.onmouseout = function() {
				this.src = this.originalSrc;
			}
		}
	}
}

preloadOverImages = [];
preloadOverImage = function(path) {
	var pre = preloadOverImages;
	var len = pre.length;
	pre[len] = new Image();
	pre[len].src = path;
}