Javascript IE iframe override issue solution

有谁跟我一样恨不得干掉IE的？

好了，吐槽完上代码。

		var g_ifm =  null;
		var g_layer = null;
		var g_isCreated = false;
		var cssIfr = 'display:none;position:absolute;left:0;top:0;width:0;height:0;overflow:hidden;background:#fff;z-index:100;border:none;';
		var cssLayer = 'display:none;position:absolute;left:0;top:0;width:auto;height:auto;z-index:102;padding-left:10;';
		function CreatePaylaterPopup()
		{
			if(!g_isCreated)
			{
				if(g_ifm != null || g_layer != null)
				{
					return false;
				}
				
				g_ifm = document.createElement('iframe');
				g_ifm.id = 'ifm_Outer';
				g_layer = document.createElement('div');
				g_layer.id = 'layer_Outer';
				document.body.appendChild(g_ifm);
				document.body.appendChild(g_layer);
				
				showDiv = document.getElementById('CarPayLaterHint');
				g_layer.appendChild(showDiv);
				g_ifm.style.cssText = cssIfr;
				g_layer.style.cssText = cssLayer;
				g_isCreated = true;
			}
			return g_isCreated;
		}
		function SetPaylaterPopupPosition(ele, isShortBanner)
		{
			var X= ele.getBoundingClientRect().left+document.body.scrollLeft;
			var Y=ele.getBoundingClientRect().top+document.body.scrollTop;
			var left = X + ele.offsetWidth;
			var top = Y -ele.offsetHeight/2 - 2;
			if(isShortBanner) top = top - 18;
			g_layer.style.left = left;
			g_layer.style.top = top;
		}
		function ShowPaylaterPopup(f)
		{
			if(f)
			{
				document.getElementById('CarPayLaterHint').style.display = 'block'
				if(g_isCreated && g_layer!=null)
				{
					g_layer.style.display = 'block';
				}
			}
			else
			{
				document.getElementById('CarPayLaterHint').style.display = 'none'
				if(g_isCreated && g_layer!=null)
				{
					g_layer.style.display = 'none';
				}
			}
		}
		function OpenPaylaterPopup(ele, isShortBanner)
		{
			if(CreatePaylaterPopup())
			{
				SetPaylaterPopupPosition(ele, isShortBanner)
				ShowPaylaterPopup(true);
			}
		}
		function ClosePaylaterPopup()
		{
				ShowPaylaterPopup(false);
		}