public.js

采用JSP + Ajax + 文本来演示多选、全选

function $() {
  var elements = new Array();
  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);
    if (arguments.length == 1) 
      return element;
    elements.push(element);
  }
  return elements;
}

function countLength(obj){
 if(obj==null)return;
 var dLen = 0,sLen = 0;
 for(i=0; i< obj.length; i++ ){
   if(obj.charCodeAt(i) > "0" && obj.charCodeAt(i) < "128")
     sLen+=1;
	else
      dLen+=2;
 }
  totalLen = sLen+dLen;
  return totalLen;
}
//cody by jarry;
String.prototype.trim = function()
{ return this.replace(/(^\s*)|(\s*$)/g, "");}

function isExist(child,obj){	
	//obj has element the child;
   for(var i=0;i<obj.elements.length;i++){
    if(obj.elements[i].tagName.toLowerCase()=="input" && obj.elements[i].type=="checkbox"){
       if(obj.elements[i].value==child)return true;
    }
   }
   return false;
}
function validateURL(url){
	//validateURL
	//if(url.search(/^[A-Za-z0-9 -]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/)!=0){
	if(url.indexOf(".") < 0){
	 //放宽限域名制含
	return false;
	//}else if(url.substring(0,4)=="www."){
	//网址不要前面的www.，如果没用的话可以注释掉;
	//return false;
	}else{
	return true;
	}
}

function showTip(msg){
	var t=$("tip");
	t.innerHTML=msg;
	t.className="tip";
}   
//clear tips;
var tm=0;var start;
function closeTip(){
		 tm++;
		 start = setTimeout(closeTip,200);
		  if(tm >= 5){
			clearTimeout(start);
		  	showTip("&nbsp;");tm = 0;
		    $("tip").className="";
		}
}

//return true or false when press ctrl key on the update input
function onCtrlDown(evt){
   var kc = evt.keyCode;
   alert(kc);
   /*
   var isCtrlkey  = false;
   if(kc==13){
	   //if press is Ctrl key and the input is not empty
       isCtrlkey =  true;
   }
   return isCtrlkey;*/
}


//设定按钮的状态
function setStatus(obj,thisform){
//多选按钮
  var f = thisform; var list = obj;

 var hasDivChild = false;
 if(list.childNodes.length>0 ){
	 for(var i=0;i<list.childNodes.length;i++){
	    var s=list.childNodes[i];
		if( typeof(s)!="undefined"  && s.tagName) {
			if(s.tagName.toUpperCase()=="DIV")
			hasDivChild = true;
		}
	 }
 }

  f.check.disabled = hasDivChild ?false:true;
  f.check.value=strAll;
//反选
  f.recheck.disabled = hasDivChild ?false:true;
//删除
  f.remove.disabled = hasDivChild  ?false:true; 

  if( !hasDivChild ){
    showTip("没有数据");
  }
}

var emptyCol="",overCol="#f1f1f1",checkedCol="#F4FFF4";
function getAbsoluteLeft( ob ){
 if(!ob){return null;}
   var obj = ob;
   var objLeft = obj .offsetLeft;
   while( obj != null && obj .offsetParent != null && obj .offsetParent.tagName != "BODY" ){
     objLeft += obj .offsetParent.offsetLeft;
     obj = obj .offsetParent;
   }
 return objLeft ;
}

// get absolute TOP position
function getAbsoluteTop( ob ){
 if(!ob){return null;}
 var obj = ob;
 var objTop = obj .offsetTop;
 while( obj != null && obj .offsetParent != null && obj .offsetParent.tagName != "BODY" ){
   objTop += obj .offsetParent.offsetTop;
   obj = obj .offsetParent;
 }
 return objTop ;
}

function disableButton(_is , thisform){
  var f = thisform;
  f.check.disabled = _is;
  f.recheck.disabled = _is;
  f.remove.disabled = _is; 
}


var currentDiv;
var currentDiv;
function showDelete(self){
  self.style.backgroundColor = overCol;
 currentDiv = self;
 var theid = "del_icon";
 if(!$(theid)){
	 var delDiv=document.createElement("div");
	 delDiv.id=theid;
	 var d=delDiv;
	 d.style.textAlign="center";d.style.fontSize="11px";
	 var edit = document.createElement("span");
	 edit.title="编辑此条";edit.style.textDecoration="underline";
     edit.onclick=function(){
         editSingle(currentDiv.parentNode,this.parentNode,currentDiv);
	 }

	 var del =  document.createElement("span");
	 del.title="删除此条";del.style.textDecoration="underline";
     del.onclick=function(){
         delSingle(currentDiv.parentNode,this.parentNode,currentDiv);
	 }

	 edit.appendChild(document.createTextNode("edit"));
     d.appendChild(edit);
     d.appendChild(document.createTextNode(" | "));
	 del.appendChild(document.createTextNode("delete"));
     d.appendChild(del);

	 d.style.width="80px";
	 d.style.lineHeight="20px";
	 d.style.color="blue";
	// d.style.zIndex="-10";
//	 d.style.backgroundColor="green";
	 document.body.appendChild(d);
	 $(theid).onmouseover=function(){
      currentDiv.style.backgroundColor = overCol;
	  this.style.display="";
	  //mouseOndeleteDiv=true;
	 }
	/* $(theid).onclick=function(){
         delSingle(currentDiv.parentNode,this,currentDiv);
	 }*/

	 //
	 $(theid).style.cursor="pointer";
 }
 if($(theid)){
   $(theid).style.display="";
   var l= getAbsoluteLeft(self) + self.offsetWidth - 80;
   var t= getAbsoluteTop(self) + 5;
   var scrollT = self.parentNode.scrollTop;//减去出现滚动条的高度;
   var t= getAbsoluteTop(self) + 5 - scrollT;
   //document.title = getAbsoluteLeft(self) +"|"+  getAbsoluteTop(self) +"|"+ self.offsetWidth +"|"+  self.offsetHeight + "t:"+t + "l:"+l;
   $(theid).style.position="absolute";
   $(theid).style.left = l+"px";
   $(theid).style.top = t+"px";
 }
}

function hideDelete(self){
 var theid = "del_icon";
  if( $(theid) ){
   self.style.backgroundColor = self.childNodes[0].checked?checkedCol:emptyCol;
   $(theid).style.display="none";
  }
}