var ajax={
http_request:false,
divobj:null,
waitstate:null,
success:null,
get:function (divid,url) {
ajax.http_request = false;
ajax.divobj = document.getelementbyid(divid);
if(window.xmlhttprequest) { //mozilla 浏览器
ajax.http_request = new xmlhttprequest();
if (ajax.http_request.overridemimetype) {//设置mime类别
ajax.http_request.overridemimetype('text/xml');
}
}else if (window.activexobject) { // ie浏览器
try {
ajax.http_request = new activexobject("msxml2.xmlhttp");
} catch (e) {
try {
ajax.http_request = new activexobject("microsoft.xmlhttp");
} catch (e) {}
}
}
if (!ajax.http_request) {
window.alert("不能创建xmlhttprequest对象实例.");
return false;
}
ajax.http_request.onreadystatechange = ajax.processrequest;
ajax.http_request.open("get", url+"&"+math.random(), true);
ajax.http_request.send(null);
},
processrequest:function () {
if (ajax.http_request.readystate == 4) {
if (ajax.http_request.status == 200) {
if(ajax.divobj!=null){
ajax.divobj.innerhtml=ajax.http_request.responsetext;
}
} else {
alert("您所请求的页面有异常。");
}
}else{
if(ajax.divobj!=null){
ajax.divobj.innerhtml='
请等待...
';
}
}
}
}
function makesmallpic(obj,w,h){
var srcimage = new image();
srcimage.src=obj.src;
var srcw=srcimage.width;
var srch=srcimage.height;
if (srcw==0)
{
obj.src=srcimage.src;
srcimage.src=obj.src;
var srcw=srcimage.width;
var srch=srcimage.height;
}
if (srch==0)
{
obj.src=srcimage.src;
srcimage.src=obj.src;
var srcw=srcimage.width;
var srch=srcimage.height;
}
if(srcw>srch){
if(srcw>w){
obj.width=neww=w;
obj.height=newh=(w/srcw)*srch;
}else{
obj.width=neww=srcw;
obj.height=newh=srch;
}
}else{
if(srch>h){
obj.height=newh=h;
obj.width=neww=(h/srch)*srcw;
}else{
obj.width=neww=srcw;
obj.height=newh=srch;
}
}
if(neww>w){
obj.width=w;
obj.height=newh*(w/neww);
}else if(newh>h){
obj.height=h;
obj.width=neww*(h/newh);
}
}