function only_num(e)
	{
		var keynum;
		var keychar;
		var numcheck;
		if(window.event) // IE
		{
			keynum = e.keyCode;
		}
		else if(e.which) // Netscape/Firefox/Opera
		{
			keynum = e.which;
		}
		keychar = String.fromCharCode(keynum);
		numcheck = /\d/;
		return (numcheck.test(keychar) || keynum==9 || keynum==13);
	}

	function echeck(str) {
		var at="@";
		var dot=".";
		var lat=str.indexOf(at);
		var lstr=str.length;
		var ldot=str.indexOf(dot);
//		alert(lat+" - "+lstr+" - "+ldot);
		if (str.indexOf(at)==-1){
		   return false;
		}
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false;
		}
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false;
		}
		 if (str.indexOf(at,(lat+1))!=-1){
		    return false;
		 }
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false;
		 }
		 if (str.indexOf(dot,(lat+2))==-1){
		    return false;
		 }
		 if (str.indexOf(" ")!=-1){
		    return false;
		 }
		 return true;
	}

function swapImg(img,newimg) {
 img.src='images/'+newimg
}

function do_main(smallimg,newpath,bigimg,description) {
	if (actual!=null)
	{
		document.getElementById(actual).style.border='none';
		
	}
	smallimg.style.border='2px solid red';
	actual=smallimg.id;
	document.getElementById('mainpic').src=newpath;
	document.getElementById('maintext').firstChild.nodeValue=description;
	bigpic=bigimg;
	window.scrollTo(0, 300);

}

function openbigpic() {
	window.open(bigpic);
}