跨域获取json

这两天搞公司网站单点登录，结果打好后一测试发现jsonp在IE下各种报错..............

弄了半天搞不定，索性自己写个出来

好了废话不多说，进入正题

function randomString(len) {
	len = len || 32;
	var $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
	var maxPos = $chars.length;
	var pwd = '';
	for (i = 0; i < len; i++) {
		pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
	}
	return pwd;
}

function RemoteAjax(insetting){
	var objStatus = {
		complete: false,
		error: false,
		requestData: null,
		responseData: null,
		init: function(setting){
			this.requestData = setting.data;
			var success = setting.success;
			var error = setting.error;

			var tempName = "arebz" + randomString(15);
			var head = document.getElementsByTagName('head')[0];

			var script = document.createElement('script')
			script.type='text/javascript';
			script.charset="GB2312";
			script.text = "var " + tempName + "_setting;\r\n"
			script.text += "function " + tempName + "_init(processor){" + tempName + "_processor = processor;}\r\n";
			script.text += "function " + tempName + "_callback(data){" + tempName + "_processor(data);}\r\n";
			head.appendChild(script);
 
			var remoteScript = document.createElement('script')
			remoteScript.type='text/javascript';
			remoteScript.charset="GB2312";
			remoteScript.src = setting.url + "?callback=" + encodeURIComponent(tempName + "_callback");
			for(var key in setting.data){
				remoteScript.src += "&" + key + "=" + encodeURIComponent(setting.data[key]);
			}

			var currentObj = this;
			if( document.all ){
				remoteScript.onreadystatechange = function(){
					if(/(complete|loaded)/.test(this.readyState)){
						remoteScript.onreadystatechange = null;
						if(!currentObj.complete){
							currentObj.error = true;
							if(typeof(error) == "function")
								error();
						}
					}
				};
			}else{
				remoteScript.onload = function(){
					remoteScript.onload = null;
					remoteScript.onerror = null;
					if(!currentObj.complete){
						currentObj.error = true;
						if(typeof(error) == "function")
							error();
					}
				};
				remoteScript.onerror = function(){
					remoteScript.onload = null;
					remoteScript.onerror = null;
					currentObj.error = true;
					if(typeof(error) == "function")
						error();
				}
			}
			
			eval(tempName + "_init")(function(data){
				currentObj.complete = true;
				remoteScript.parentNode.removeChild(remoteScript); 
				script.parentNode.removeChild(script);
				currentObj.responseData = data;
				if(typeof(success) == "function")
					success(data);
			});
			
			head.appendChild(remoteScript);
		}
	};

	objStatus.init(insetting);
	return objStatus;
}