JSP模式窗体生成与布局详解

function updatephoto(){
     
      //创建模式层
        var div=document.createElement("div");
        div.id="ms";
        div.style.display="block";
        div.style.height=document.body.scrollHeight;
        div.style.width=document.body.clientWidth;;
        div.style.backgroundColor="gray";
        div.style.opacity=0.3;/*非IE*/
        div.style.filter="alpha(opacity=30)";/*IE*/
        div.style.position='absolute';
        div.style.margin="0 auto";
document.body.appendChild(div);
div.style.left="0px";
    div.style.top=0;
     
     //创建修改图像的层
        var sdiv=document.createElement("div");
        sdiv.style.display="block";
        sdiv.id="sdiv";
        sdiv.style.height=180;
        sdiv.style.width=350;
        sdiv.style.backgroundColor="lightblue";
        sdiv.style.top=document.body.scrollTop+document.body.clientHeight/2-90;
        sdiv.style.position="absolute";
        sdiv.style.left=document.body.clientWidth/2-175;
        document.body.appendChild(sdiv);
        
         for(var i=0;i<2;i++){