var http_request = false;
function makeRequest(url, functionName, httpType, sendData) {
	http_request = false;
	if (!httpType) httpType = "GET";
	if (window.XMLHttpRequest) { 
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/plain');
		}
		} else if (window.ActiveXObject) {
			try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Cannot send an XMLHTTP request');
		return false;
	}
	var changefunc="http_request.onreadystatechange = "+functionName;
	eval (changefunc);
	http_request.open(httpType, url, true);
	http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	http_request.send(sendData);
}

//HTTP返回值处理
function getReturnedText () {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			var http_msg = http_request.responseText;
			if (http_msg=='0') {
				frm.submits.disabled="disabled";
				show.style.display='';
			}else{
				frm.submits.disabled="";
				show.style.display='none';
			}
		}
	}
}

// 图片大小控制
function ReImgSize(){
	for (i=0; i<document.images.length; i++){
		if (document.all){
			if (document.images[i].width>600){
				document.images[i].width = "600";
				document.images[i].title = "在新窗口打开图片";
				document.images[i].style.cursor = "pointer";
				document.images[i].border = 0;
				document.images[i].onclick = function(e){window.open(this.src);}
			}
		}else{
			if (document.images[i].width>500){
				document.images[i].title = "在新窗口打开图片";
				document.images[i].style.cursor = "pointer";
				document.images[i].border = 0;
				document.images[i].onclick = function(e){window.open(this.src);}
			}
		}
	}
}