/**
//stop the mouse right action on picture
function shieldOncontextmenu() {
	var  target = getEvent().target || getEvent().srcElement; // shijian laiyuan
	if(target.src){
		return false;
	}
} 
function getEvent(e) {
	var ev = e || window.event;
	if (!ev) {
		var c = this.getEvent.caller;
		while (c) {
			ev = c.arguments[0];
			if (ev && Event == ev.constructor) {
				break;
			}
			c = c.caller;
		}
	}
	return ev;
} 
document.oncontextmenu=shieldOncontextmenu
**/