var isIE;
var isFirefox;
var obj ;
function sniffBrowserType() {
	isFirefox = ( navigator.appName == "Netscape" );
	isIE = (navigator.appName == "Microsoft Internet Explorer" ); 
}
function getElement( id ) 
{
	if( isIE ) {
		return document.all[ id ];
	}
	else {
		return document.getElementById( id );
	}
}

					var TimeOut=5000;              //切换时间(单位毫秒);
					var StartType="onmouseover";   //缩略图触发动作
					var imgUrl=new Array();
					var imgSUrl=new Array(); 
					var imgLink=new Array();
					var imgtext=new Array();
					var imgAlt=new Array();
					var adNum=0;
                                        var theTimer;