jQuery.webAjax={
	/*Ajax操作函数
	 *url后台页
	 *data可以是username=escape("mlj")&userage=escape("20")或{username:"马立杰",userage:20}	 
	 *async true默认异步，false同步
	 */
	get:function(url,data,async,returnDataType){
		var result="err";
		try
		{
			$.ajax({
				type:"GET",
				url:url,
				data:data,
				async: async,
				dataType:returnDataType,
				success: function(msg){
					result=msg;
				}
			});  
		}
		catch(expObj)
		{
			result="err";
		}
		return result;
		
	},
	post:function(url,data,async,returnDataType){
		var result="err";
		try
		{
			$.ajax({
				type:"POST",
				url:url,
				data:data,
				async: async,
				dataType:returnDataType,
				success: function(msg){
					result=msg;
				}
			});  
		}
		catch(expObj)
		{
			result="err";
		}
		return result;
	}
	
}