function changeTabDiv(tab, theCurrTabHiddenField){
	for(var i=1;i<9;i++){
		var currTag=document.getElementById('menutab'+i);
		var currContentDiv=document.getElementById('menutabcontent'+i);
		if(currTag) currTag.className=i.toString()==tab?"tab_on":"tab_off";
		if(currContentDiv) currContentDiv.style.display=i.toString()==tab?"":"none";
	}
	if(document.getElementById(theCurrTabHiddenField)){
		document.getElementById(theCurrTabHiddenField).value=tab;
	}
}