// toggle tabs 
function toggle(num,tabId,int){
	var i = 1;
	while(i <= int){
		if(num!=1){
			document.getElementById(tabId+'1').className='null';
		}
		if(num == i){
			document.getElementById(tabId+i).className='selected';
			document.getElementById("div_"+tabId+i).style.display="block";
		} else {
			document.getElementById(tabId+i).className='null';
			document.getElementById("div_"+tabId+i).style.display="none";
		}
		i++;
	}
}