// JScript 文件


function urlpathname(){
    var url1=location.pathname;
    url1=url1.substring(url1.lastIndexOf('/')+1).toLowerCase();//把字符串转换为小写
    var left1=document.getElementById("left_div1");
    var left2=document.getElementById("left_div2");
    var left3=document.getElementById("left_div3");
    var left4=document.getElementById("left_div4");
    left1.style.display="none";
    left2.style.display="none";
    left3.style.display="none";
    left4.style.display="none";
    switch(url1){
        case "contact.aspx":{left3.style.display="block";break;}
        case "products.aspx":{left2.style.display="block";break;}
        case "technology.aspx":{left4.style.display="block";break;}
        default :{left1.style.display="block";break;}
    }
    
}

function MaxImg(obj,MaxWidth,MaxHeight){
    //var MaxWidth=170;//设置图片宽度界限 
    //var MaxHeight=120;//设置图片高度界限
    var HeightWidth=obj.offsetHeight/obj.offsetWidth;//设置高宽比 
    var WidthHeight=obj.offsetWidth/obj.offsetHeight;//设置宽高比 
    //alert("test"+obj.offsetHeight+obj.fileSize);

    if(obj.readyState!="complete"){
     return false;//确保图片完全加载
    }
    var WHPoor=(WidthHeight)-(MaxWidth/MaxHeight);
    if(WHPoor>=0){
        if(obj.offsetWidth>MaxWidth){ 
            obj.width=MaxWidth; 
            obj.height=MaxWidth*HeightWidth; 
        } 
    }
    else{
        if(obj.offsetHeight>MaxHeight){ 
            obj.height=MaxHeight; 
            obj.width=MaxHeight*WidthHeight; 
        }
    }

}