//重置大图片
function resizeImage() {

	var msgAreas = document.getElementsByTagName("div");
	for (i = 0; i < msgAreas.length; i++) {
		if (msgAreas[i].className == "itemmessage" || msgAreas[i].className == "imagebox") {
			var imgSinLog = msgAreas[i].getElementsByTagName("img");
			for(j = 0; j < imgSinLog.length; j++) {
				if (imgSinLog[j].width > "500") {
					imgSinLog[j].width = "500";
					imgSinLog[j].style.cursor= 'pointer';
					imgSinLog[j].onclick = function() {window.open(this.src);}
					if (navigator.userAgent.toLowerCase().indexOf('ie') > -1) {
//						imgSinLog[j].title = "请客";
						imgSinLog[j].onmousewheel = function imgZoom() {
							  var zoom = parseInt(this.style.zoom, 10) || 100;
							  zoom += event.wheelDelta / 12;
							  if (zoom > 0) this.style.zoom = zoom + '%';
							  return false;
							}
					}
//					else {
//						imgSinLog[j].title = '点击图片可在新窗口打开';
//					}
				}
			}
		}
	}
}