js 鼠标移动显示图片的简单实例

一、js代码

//***********默认设置定义.*********************   
tPopWait=50;//停留tWait豪秒后显示提示。   
tPopShow=5000;//显示tShow豪秒后关闭提示   
showPopStep=20;  
popOpacity=99;  //***************内部变量定义*****************   
sPop=null;  
curShow=null;  
tFadeOut=null;  
tFadeIn=null;  
tFadeWaiting=null;  
document.write("<mce:style type='text/css'id='defaultPopStyle'><!--  
");  
document.write(".cPopText { line-break : normal;word-break : break-all ; background-color: #FEFCF3;color:#000000; border: 1px #E7B68C solid;padding-top: 2px; padding-right: 4px; padding-left: 4px; padding-bottom: 2px;font-size: 12px;width:96px; filter: Alpha(Opacity=0)}");  
document.write("  
--></mce:style><style type='text/css'id='defaultPopStyle' mce_bogus="1">");  
document.write(".cPopText { line-break : normal;word-break : break-all ; background-color: #FEFCF3;color:#000000; border: 1px #E7B68C solid;padding-top: 2px; padding-right: 4px; padding-left: 4px; padding-bottom: 2px;font-size: 12px;width:96px; filter: Alpha(Opacity=0)}");  
document.write("</style>");  
document.write("<div id='dypopLayer' style="position:absolute;z-index:1000;" mce_style="position:absolute;z-index:1000;" class='cPopText'></div>");  
  
function showPopupText(){  
var o=event.srcElement;  
    MouseX=event.x;  
    MouseY=event.y;  
    if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};  
        if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};  
    if(o.dypop!=sPop) {  
            sPop=o.dypop;  
            clearTimeout(curShow);  
            clearTimeout(tFadeOut);  
            clearTimeout(tFadeIn);  
            clearTimeout(tFadeWaiting);   
            if(sPop==null || sPop=="") {  
                dypopLayer.innerHTML="";  
                dypopLayer.style.filter="Alpha()";  
                dypopLayer.filters.Alpha.opacity=0;   
                }  
            else {  
                if(o.dyclass!=null) popStyle=o.dyclass   
                    else popStyle="cPopText";  
                curShow=setTimeout("showIt()",tPopWait);  
            }  
    }  
}  
function showIt(){  
        dypopLayer.className=popStyle;  
        dypopLayer.innerHTML=sPop;  
        popWidth=dypopLayer.clientWidth;  
        popHeight=dypopLayer.clientHeight;  
        if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24  
            else popLeftAdjust=0;  
        if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24  
            else popTopAdjust=0;  
        dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;  
        dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;  
        dypopLayer.style.filter="Alpha(Opacity=0)";  
        fadeOut();  
}  
function fadeOut(){  
    if(dypopLayer.filters.Alpha.opacity<popOpacity) {  
        dypopLayer.filters.Alpha.opacity+=showPopStep;  
        tFadeOut=setTimeout("fadeOut()",1);  
        }  
        else {  
            dypopLayer.filters.Alpha.opacity=popOpacity;  
            tFadeWaiting=setTimeout("fadeIn()",tPopShow);  
            }  
}  
function fadeIn(){  
    if(dypopLayer.filters.Alpha.opacity>0) {  
        dypopLayer.filters.Alpha.opacity-=1;  
        tFadeIn=setTimeout("fadeIn()",1);  
        }  
}  
document.onmouseover=showPopupText; 

二、html代码包含js代码即可，使用范例

<a href="../UpLoadFile/200911784060017.jpg" target="_blank" title="<img src=../UpLoadFile/200911784060017.jpg  />">大</a> <a href="../UpLoadFile/200911784060018.jpg" target="_blank" title="<img src=../UpLoadFile/200911784060018.jpg width=96 height=70 />">小</a>