var sBaseStr="filter : progid:DXImageTransform.Microsoft.GradientWipe ( ";
var oParentDiv,oTextDiv;
var img_3 = "images/qiu.png";
var img_4 = "images/dong.png";
var img_1 = "images/chun.png";
var img_2 = "images/xia.png";

var imgsnum = 0;
function rdl_doInit(){
	if(document.all)
	{
		oParentDiv=document.all("idParentDiv");
		with (oParentDiv.filters[0]) 
		{
			Duration=3;GradientSize=0.5;Motion="reverse";WipeStyle=0;
		}
		rdl_play();
	}
	else
	{
		forfirefox();
	}
}
function rdl_play(){
with (oParentDiv)
{
	 if (children[0].style.visibility=="hidden")
	 {
	  	children[1].style.visibility="visible";
	 } 
	 else
	 {
	  	children[1].style.visibility="hidden";
	 }
	 filters[0].Apply();
	 imgsnum+=1;
	 if (imgsnum > 4)
	 {
		imgsnum = 1;
	 }
	switch (imgsnum)
	{
		case 1:
		document.all.imgs1.src=img_3;
		break;
		case 2:
		document.all.imgs2.src=img_4;
		break;
		case 3:
		document.all.imgs1.src=img_1;
		break;
		case 4:
		document.all.imgs2.src=img_2;
		break;
	} 
	if (children[0].style.visibility=="hidden")
	{
		children[0].style.visibility="visible";
	}
	else
	{
		children[0].style.visibility="hidden";
	} 
	if (children[1].style.visibility=="hidden")
	{
		children[1].style.visibility="visible";
	}
	else
	{
		children[1].style.visibility="hidden";
	}
		filters[0].play();
	}
}
function forfirefox()
{
	 var imgo=document.getElementById("imgs1");
	 imgo.style.visibility="visible";
	 imgsnum+=1;
	 if (imgsnum > 4)
	 {
		imgsnum = 1;
	 }
	switch (imgsnum)
	{
		case 1:
		imgo.src=img_1;
		break;
		case 2:
		imgo.src=img_2;
		break;
		case 3:
		imgo.src=img_3;
		break;
		case 4:
		imgo.src=img_4;
		break;
	} 

}
window.onload=rdl_doInit;
setInterval("rdl_doInit()",5000);