js calls image hiding & display implementation code_javascript skills

复制代码 代码如下:

<SCRIPT> <br>var intTimeStep=20; <br>var isIe=(window.ActiveXObject)?true:false; <br>var intAlphaStep=(isIe)?5:0.05; <br>var curSObj=null; <br>var curOpacity=null; <br>function startObjVisible(objId) <br>{ <br>curSObj=document.getElementById(objId); <br>setObjState(); <br>} <br>function setObjState(evTarget) <br>{ <br>if (curSObj.style.display==""){curOpacity=1;setObjClose();} <br>else{ <br>if(isIe) <br>{ <br>curSObj.style.cssText='DISPLAY: none;Z-INDEX: 1; FILTER: alpha(opacity=0); POSITION: absolute;'; <br>curSObj.filters.alpha.opacity=0; <br>}else <br>{ <br>curSObj.style.opacity=0 <br>} <br>curSObj.style.display=''; <br>curOpacity=0; <br>setObjOpen(); <br>} <br>} <br>function setObjOpen() <br>{ <br>if(isIe) <br>{ <br>curSObj.filters.alpha.opacity =intAlphaStep; <br>if (curSObj.filters.alpha.opacity<100) setTimeout('setObjOpen()',intTimeStep); <BR>}else{ <BR>curOpacity =intAlphaStep; <BR>curSObj.style.opacity =curOpacity; <BR>if (curOpacity<1) setTimeout('setObjOpen()',intTimeStep); <BR>} <BR>} <BR>function setObjClose() <BR>{ <BR>if(isIe) <BR>{ <BR>curSObj.filters.alpha.opacity-=intAlphaStep; <BR>if (curSObj.filters.alpha.opacity>0) { <br>setTimeout('setObjClose()',intTimeStep);} <br>else {curSObj.style.display="none";} <br>}else{ <br>curOpacity-=intAlphaStep; <br>if (curOpacity>0) { <br>curSObj.style.opacity =curOpacity; <br>setTimeout('setObjClose()',intTimeStep);} <br>else {curSObj.style.display='none';} <br>} <br>} <br></SCRIPT>