// JavaScript Document

function randomString(string_length) {
	var chars = "ABCDEFGHIJKLMNPQRSTUVWXTZ";
//	var string_length = 8; abcdefghiklmnopqrstuvwxyz
	var randomstring = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
//	document.randform.randomfield.value = randomstring;
	return randomstring;
}

//var keyword=Math.floor(Math.random()*10001);
var keyword = randomString(5);
document.write('<input type="hidden" name="imagenum" value="' + keyword + '" >');