function xml(){
	xmlhttprequest=false;
	if(window.XMLHttpRequest){//Mozilla
		 xmlhttprequest=new XMLHttpRequest();
		 if(xmlhttprequest.overrideMimeType){//MIME
		 	xmlhttprequest.overrideMimeType("text/xml");
		 }
	}
	else if(window.ActiveXObject){//IE
		 try{
		  	xmlhttprequest=new ActiveXObject("Msxml2.XMLHttp");
		 }catch(e){
			try{
				xmlhttprequest=new ActiveXobject("Microsoft.XMLHttp");
			}catch(e){}
		 }
	}
}