function newXmlHttp(){
	var xmlhttp = false;
	try{
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		}catch(e){
			try{
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			}catch(e){
				xmlhttp = false;
			}
		}
	if(!xmlhttp && document.createElement){
		xmlhttp = new XMLHttpRequest();
	}

return xmlhttp;
}

var  xmlhttp;

function slideShow() {
	
	 xmlhttp = newXmlHttp();
     xmlhttp.onreadystatechange = function () { 
          if (xmlhttp.readyState==4) {
               if (xmlhttp.status==200) {
                    var data=xmlhttp.responseText; 
                    document.getElementById("showSlide").innerHTML=data; 
				    getcontent_height();
               } 
          } 
     };
	 //xmlhttp.open("GET", "a.html", true); 
	 xmlhttp.open("GET", "slide.html", true); 
     xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); // set Header
     xmlhttp.send(null); 
}