function $(id){return document.getElementById(id);}
function ImageResize(img){
	var i=new Image();
	i.src=img.src;
	if(i.width>img.width){
		i.height= i.height * (img.width/i.width)
		i.width=img.width;
	}
	if(i.height>img.height){
		i.width=i.width*(img.height/i.height);
		i.height=img.height;
	}
	img.height=i.height;
	img.width=i.width;
}
function ShowPanel(s){
    var panels=document.getElementsByTagName("div");
    for(var i=0;i<panels.length;i++){
        if(panels[i].getAttribute("ispanel")=="1"){
            if(panels[i].getAttribute("panelName")==s)
                panels[i].style.display="";
            else
                panels[i].style.display="none";
        }
    }
}
function GetPanel(s){
    var panelTarget=null;
    var panels=document.getElementsByTagName("div");
    for(var i=0;i<panels.length;i++){
        if(panels[i].getAttribute("ispanel")=="1"){
            if(panels[i].getAttribute("panelName")==s){
                panelTarget = panels[i];
                break;
            }
        }
    }
    return panelTarget;
}
function ShowObject(id){
    if($(id))$(id).style.display="";
}
function HideObject(id){
    if($(id))$(id).style.display="none";
}
function ShowHotSearchKey(type){
    for(var i=0;i<4;i++){
        $("HotSeach_" + i).style.display="none";
    }
    switch(Number(type)){
        case 0:
            $("HotSeach_0").style.display="";
			document.search_form.action="Search_Supply.aspx?ClassName=供应";
            break;
        case 1:
            $("HotSeach_1").style.display="";
			document.search_form.action="Search_Supply.aspx?ClassName=求购";
            break;
        case -1:
            $("HotSeach_2").style.display="";
			document.search_form.action="Search_Company.aspx";  
            break;
        case -2:
            $("HotSeach_3").style.display="";
			document.search_form.action="Search_Product.aspx";   
            break;
    }
}
function CheckSearchSubmit(){
    if($("Keys").value.trim() == ""){
        alert("请输入搜索关键字！");
        $("Keys").focus();
        return false;
    }
    return true;
}
function resizepic(thispic,size)
{
if(thispic.width>size) thispic.width=size;
}
function st(url){ 
window.status=url;
} 
//提取查找字符串前面所有的字符
function getFront(mainStr,searchStr){
   // foundOffset=mainStr.indexOf(searchStr);
   // if(foundOffset==-1){
      // return null;
   // }
   // return mainStr.substring(0,foundOffset);
return mainStr.substring(0,mainStr.length/2);
}
//提取查找字符串后面的所有字符
function getEnd(mainStr,searchStr){
   // foundOffset=mainStr.indexOf(searchStr);
   // if(foundOffset==-1){
      // return null;
   // }
   // return mainStr.substring(foundOffset+searchStr.length,mainStr.length);
return mainStr.substring(mainStr.length/2,mainStr.length);
}
//在字符串 searchStr 前面插入字符串 insertStr 
function insertString(mainStr,searchStr,insertStr){
    var front=getFront(mainStr,searchStr);
    var end=getEnd(mainStr,searchStr);
    if(front!=null && end!=null){
       return front+insertStr+searchStr+end;
    }
    return null;
}