function shTab(showtab){
	var divtablis = new Array();
	var divheaderlis = new Array();
	var descctr = 0;
	var headerctr = 0;
	var ulis = document.getElementById("tabs-desc");
	var divlis =  ulis.getElementsByTagName("div");
	var tabheader = "tabheader" + showtab;
	var tabcontents = "tab-contents" + showtab;
	var totaltabs = 4;
	
	if(document.getElementById(tabheader)){
		if(divlis.length > 0){
			for(i=0; i < divlis.length; i++){
				if(divlis[i].className == "tabheader" || divlis[i].className == "tabhover"){
					divheaderlis[headerctr] = divlis[i];
					divlis[i].className = "tabheader";
					headerctr++;				
				}
				if(divlis[i].className == "tab-contents"){
					divtablis[descctr] = divlis[i];
					divlis[i].style.display = "none";
					descctr++;
				}
			}
			document.getElementById(tabheader).className = "tabhover";
			document.getElementById(tabcontents).style.display = "block";
		}			
	}else{
		for(var i=0; i<totaltabs; i++ ){
			tabheader = "tabheader" + i;
			tabcontents = "tab-contents" + i;
			if(document.getElementById(tabheader)){
				document.getElementById(tabheader).className = "tabhover";
				document.getElementById(tabcontents).style.display = "block";
				break;
			}
		}
	}
}