/**
 *一些常用方法
 */
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_moz = (navigator.product == 'Gecko') && userAgent.substr(userAgent.indexOf('firefox') + 8, 3);
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);
var is_safari = (userAgent.indexOf('webkit') != -1 || userAgent.indexOf('safari') != -1);
 	//去掉字符串的空格
  	String.prototype.Trim = function(){
  	
  		return this.replace(/(^\s*)|(\s*$)/g, ""); 
    }  
    //判断n是否是数字
    function isNumber(n){
		var flag;
		for(var i=0;i<n.length;i++){
			var m=n.substring(i,i+1);
			if(m>=1 || m<=9){
				flag=true;
			}
			else{
				flag=false;
				break;
			}
		}
		return flag;
	}
    function getSelectedValue(selectId){
    	var select = document.getElementById(selectId).options;
    	for(var i = 0; i < select.length;i++){
    		if(select[i].selected){
    			return select[i].value;
    		}
    	}
    	return "";
    }
    function getSelectedText(selectId){
    	var select = document.getElementById(selectId).options;
    	for(var i = 0; i < select.length;i++){
    		if(select[i].selected){
    			return select[i].innerText;
    		}
    	}
    	return "";
    }
    function setSelected(selectId,selectValue){
    	var select = document.getElementById(selectId).options;
    	for(var i = 0;i < select.length;i++){
    		if(select[i].value == selectValue){
    			select[i].selected = true;
    			break;
    		}
    	}
    }
    function getRadiosCheckdValue(radioName){
    	var radio = document.getElementsByName(radioName);
    	for(var i = 0;i < radio.length;i++){
    		if(radio[i].checked){
    			return radio[i].value;
    		}
    	}
    	return null;
    }
	/*
	 * url：访问的地址 
	 * processFunction：返回的处理函数，只需要输入函数名不带括号
	 */
	function send_request(url,processFunction){
  		http_request=false;
  		//创建XMLHttpRequest
  		if(window.XMLHttpRequest){// IE
  			http_request=new XMLHttpRequest();
  			if(http_request.overrideMimeType){
  				http_request.overrideMimeType("text/xml");
  			}
  		}
  		else if(window.ActiveXObject){
  			try{
  				http_request=new ActiveXObject("Msxml12.XMLHTTP");
  			}
  			catch(e){
  				try{
  					http_request=new ActiveXObject("Microsoft.XMLHTTP");
  				}
  				catch(e){}
  			}
  		}
  		if(!http_request){
  			window.alert("创建XMLHTTPREQUEST失败！");
  			return false;
  		}
  		http_request.onreadystatechange=eval(processFunction);
  		http_request.open('POST',url,true);
  		http_request.send(null);
  	}
  	//window.onerror = function(){return false;};
  	
  	function setCopy(_sTxt){
  		if(is_ie) {
  			clipboardData.setData('Text',_sTxt);
  			alert ("网址“"+_sTxt+"”\n已经复制到您的剪贴板中\n您可以使用Ctrl+V快捷键粘贴到需要的地方");
  		} else {
  			prompt("请复制网站地址:",_sTxt); 
  		}
  	}
  	function copy(_sTxt,message){
  		if(is_ie) {
  			clipboardData.setData('Text',_sTxt);
  			alert (message);
  		} else {
  			prompt("请复制网站地址:",_sTxt); 
  		}
  	}
  	//选中多个checkbox
  	function selectedCheckbox(checkboxName,values){
  		var box = document.getElementsByName(checkboxName);
		for(var j = 0;j < values.length;j++){
			for(var i = 0;i < box.length;i++){
	  			var boxvalue = box[i].value;
	  			if(values[j] == boxvalue)
	  				box[i].checked = true;
			}
		}
  	}
  	
  	function selectAllCheckbox(me,name){
  		var checkbox = document.getElementsByName(name);
  		if(me.checked){
  			for(var i = 0;i < checkbox.length;i++){
  				checkbox[i].checked = true;
  			}
  		}
  		else{
  			for(var i = 0;i < checkbox.length;i++){
  				checkbox[i].checked = false;
  			}
  		}
  	}