判断对象是否存在

判断对象是否存在

[align=right]录入日期:2006-11-15 21:49:52[/align]

<SCRIPT language=JavaScript defer>
var Obj1=document.getElementById("kk1")
var Obj2=document.getElementById("kk2")
//框架之间取得对象
//var Obj=parent.frames.[frameName].[ObjName]
if(CheckObj(Obj1)){
alert("obj1是对象")
} else {
alert("obj1不是对象")
}
if(CheckObj(Obj2)){
alert("obj2是对象")
} else {
alert("obj2不是对象")
}
//检查Obj是否是对象,检查5次
function CheckObj(Obj) {
var CheckObjTimes=0;
while (CheckObjTimes<5) {
if (Obj) {
return true;
} else{
CheckObjTimes=CheckObjTimes+1;
setTimeout("",1000);
}
}return false;
}
</script>
<div id="kk1"></div>

转自：http://www.hphu.com/tree/?/tree/html/20061116/article_5.htm

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