function blank(s){//returns true if the element is blank
	for(var i=0; i<s.length; i++){
		var c=s.charAt(i);
		if((c!=' ') && (c!='') && (c!='\n')) return false;
	}
	return true;
}
function allblank(f){
	for (var i = 0; i<f.elements.length; i++){
		if(f.elements[i].type=="text" || f.elements[i].type=="textarea"){
			if(!blank(f.elements[i].value)){
				return true;
			}
		}
	}
	return false;
}
function alert_array(arr){
	var m="";
	for(var i=0;i<arr.length;i++){
		m+=arr[i]+"\n";
	}
	alert(m);
}
function get_element(elm){
	if(document.all){
		if(document.all[elm]) var el=document.all[elm];
		else return false;
	}	
	else if(document.getElementById){
		if(document.getElementById(elm)) var el=document.getElementById(elm);
		else return false;
	}
	return el;
}
function preload(url){
	var im = new Image();
	im.src=url;
}
function removeSpaces(string) {
	var tstring = "";
	string = '' + string;
	splitstring = string.split(" ");
	for(i = 0; i < splitstring.length; i++)
	tstring += splitstring[i];
	return tstring;
}
function post_session_id(){
	var sess_form=get_element("session_form");
	sess_form.submit();
}
///////////////   SELECT BOXES   ////////////////
function sb_open(el){
	var sb=get_element("dd_"+el);
	sb.style.display="block";
}
function sb_close(el){
	var sb=get_element("dd_"+el);
	sb.style.display="none";
}

function set_sel_text(el,val,change){
	var sel=get_element(el);
	sel.value=val;
	sb_close(el);
	if(change) set_dd_list();
}
function str_replace(str_normal,str_find,str_replace){
	var rv="";
	var ix=str_normal.toLowerCase().indexOf(str_find);
	while(ix>-1){
		rv+=str_normal.substring(0,ix)+str_replace;
		str_normal=str_normal.substring(ix+str_find.length);
		ix=str_normal.toLowerCase().indexOf(str_find);
	}
	return(rv+str_normal);
}
function set_dd_list(){
	var cat_sel=get_element("category");
	var sub_sel=get_element("sub_category");
	var s=new String(cat_sel.value);
	if(s.length){
		s=str_replace(s," ","_");
		s=str_replace(s,")","_");
		s=str_replace(s,"(","_");
		s=str_replace(s,"-","_");
		s=str_replace(s,".","_");
		s=str_replace(s,"'","_");
		s=str_replace(s,'"',"_");
		s=str_replace(s,'/',"_");
		s=str_replace(s,',',"_");
		s=str_replace(s,'&',"_");
		var cat=eval(s);

		for(var i=0;i<cat.length;i++){
			sub_sel.options[i] = new Option(cat[i],cat[i]);
		}

/*		var result="";
		for(var i=0;i<cat.length;i++){
			result+="<div class='sel_list' onmouseover='this.className=\"sel_list_over\";' onmouseout='this.className=\"sel_list\";' onclick='set_sel_text(\"sub_category\",\""+cat[i]+"\");'>"+cat[i]+"</div>";
		}
*/
	}
//	sub_sel.innerHTML=result;
}
function do_adv_sub_cats(){
	var sel_val;
	var cat_sel=get_element("category");
	var sub_sel=get_element("sub_category");
	sub_sel.options.length=0;
	var s=new String(cat_sel.value);
	if(s.length){
		s=str_replace(s," ","_");
		s=str_replace(s,")","_");
		s=str_replace(s,"(","_");
		s=str_replace(s,"-","_");
		s=str_replace(s,".","_");
		s=str_replace(s,"'","_");
		s=str_replace(s,'"',"_");
		s=str_replace(s,'/',"_");
		s=str_replace(s,',',"_");
		s=str_replace(s,'&',"_");
		var cat=eval(s);
		cat.unshift("All Sub Categories","..............................");
		for(var i=0;i<cat.length;i++){
			if(i<2) sel_val=0;
			else sel_val=cat[i];
			sub_sel.options[i] = new Option(cat[i],sel_val);
		}
	}
	
}


/////////////////////////////////////////////////