<!--テキストエリア幅------------------------------------------------------------------------->
function resize_textarea(ev){
    //if (ev.keyCode != 13) return;
    var textarea = ev.target || ev.srcElement;
    var value = textarea.value;
    var lines = 1;
    for (var i = 0, l = value.length; i < l; i++){
        if (value.charAt(i) == '\n') lines++;
     }
     textarea.setAttribute("rows", lines);
     // window.status = lines;
}


<!--マウスオーバー------------------------------------------------------------------------->
function smartRollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}