var stra_arr   = new Array();
var stra_clear = new Array();
function straFloat(stra) {
	stra_arr[stra_arr.length] = this;
	var strapointer = eval(stra_arr.length-1);
	this.pagetop       = 0;
	this.cmode         = (document.compatMode && document.compatMode!="BackCompat") ? document.documentElement : document.body;
	this.strasrc        = document.all? document.all[stra] : document.getElementById(stra);
	this.strasrc.height = this.strasrc.offsetHeight;
	this.straheight     = this.cmode.clientHeight;
	this.straoffset     = straGetOffsetY(stra_arr[strapointer]);
	var strabar         = 'stra_clear['+strapointer+'] = setInterval("straFloatInit(stra_arr['+strapointer+'])",1);';
	strabar             = strabar;
	eval(strabar);
}
function straGetOffsetY(stra) {
	var straTotOffset = parseInt(stra.strasrc.offsetTop);
	var parentOffset = stra.strasrc.offsetParent;
	while ( parentOffset != null ) {
		straTotOffset += parentOffset.offsetTop;
		parentOffset  = parentOffset.offsetParent;
	}
	return straTotOffset;
}
function straFloatInit(stra) {
	stra.pagetop = stra.cmode.scrollTop;
	stra.strasrc.style.top = stra.pagetop - stra.straoffset + "px";
}
new straFloat("stripeads");