function findTopPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
	do {			
			curtop += obj.offsetTop;
		} while (obj = obj.offsetParent);
	};
	return curtop;
}

var currtab = 1;
var maxtabheight =0;

function SetTab(newtab)
{
	document.getElementById("tab" + currtab + "_content").style.visibility='hidden';
	document.getElementById("tab" + currtab).className = "tab" + currtab + "unseltab";
	
	document.getElementById("tabcontent").style.height = document.getElementById("tab" + newtab + "_content").offsetHeight +12;
	
	document.getElementById("tab" + newtab + "_content").style.visibility='visible';
	document.getElementById("tab" + newtab).className = "tab" + newtab + "seltab";
			
	currtab = newtab;
}