function ch_open_window(win_name,winheight,winwidth,url) {
  if (win_name==null) win_name='pic';
  if (winheight==null) winheight='400';
  if (winwidth==null) winwidth='550';
  if (url==null) url='';
  var things_to_show = 'toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width='+winwidth+',height='+winheight;
  window.open(url,win_name,things_to_show);
}

function ch_field_focus(theform,thefield) {
  if (document.forms[theform].elements[thefield]) {
    document.forms[theform].elements[thefield].focus();
  }
}

function ch_toggle_visibility(element_id,display_value) {
	if (display_value == null ) display_value = 'block' ;
	if (document.getElementById) {
		current_value = document.getElementById(element_id).style.display;
		document.getElementById(element_id).style.display = (current_value == 'none' ? display_value : 'none');
	}
}

function ch_disable_submit(form_name,button_name,msg) {
	button_ref = document.forms[form_name].elements[button_name];
	button_ref.disabled = true;
	if (msg != null) {
		// button_ref.value = msg;
		button_ref.value = 'Please wait ...';
	}
	return true;
}

function ch_set_image_width_class() {
	if (document.getElementById && document.getElementById('ch_lot_main_img')) {
		element_ref = document.getElementById('ch_lot_main_img');
		the_width = element_ref.getElementsByTagName('img')[0].offsetWidth;
		if (the_width < 200 ) {
			element_ref.className='ch_lot_img_sub_200';
		} else if (the_width < 300) {
			element_ref.className='ch_lot_img_sub_300';
		} else if (the_width < 400) {
			element_ref.className='ch_lot_img_sub_400';
		} else if (the_width < 500) {
			element_ref.className='ch_lot_img_sub_500';
		} else {
			element_ref.className='ch_lot_img_500_plus';
		}
	}
}


function ch_field_select(theform,thefield) {
  if (document.forms[theform].elements[thefield]) {
    document.forms[theform].elements[thefield].select();
  }
}

function ch_set_fi(my_lot) {
	document.getElementById('ch_my_lots_update').action += ('#ch_lot_' + my_lot) ;
	return true;
}

function ch_check_bid_values() {
	form_ref = document.forms.ch_bid_form;
	some_bids = false;
	missing_bids = 0;
	for (i = 0; i < form_ref.elements.length; i++) {
		this_input = form_ref.elements[i];
		if ( this_input.name.match(/^lot_\d+[a-z]?$/) ) {
			if ( this_input.value == '0' || this_input.value == '' || this_input.value == null ) {
				missing_bids += 1;
			} else if ( this_input.value.match(/^\s*\d+\s*$/) ) {
				some_bids = true;
			} else {
				alert('Bid values must be entered as round numbers without any punctuation. For example "1500", but not "1,500" or "1500.0".');
				this_input.focus();
				this_input.select();
				return false;
			}
		}
	}
	if (! some_bids) {
		alert('You have not entered any bids.');
		return false;
	}
	if (missing_bids) {
		return confirm('You have not entered any bid for ' + missing_bids + ' of your lots. Are you sure you wish to continue?');
	} else {
		form_ref.elements.javascript_on.value = '1';
		return true;
	}
}

function ch_check_bid_contact_info() {
	var form_ref = document.forms.ch_bid_form;
	return true;
}



function email_link(email_id,char_numbers) {
	eval('addr = String.fromCharCode(' + char_numbers + ')');
	email_link = document.createElement('a');
	email_link.href=('mai' + 'lto:' + addr);
	email_link.appendChild(document.createTextNode(addr));
	document.getElementById(email_id).replaceChild( email_link, document.getElementById(email_id).childNodes[0] );
}


function ch_ml_ajax_init() {

	jQuery(document).ready(function(){
	
		jQuery("#ch_my_lots_update input[type='submit']").bind("click",
			function(){
				var input_ref = this;
				var postdata = ("update_my_lots=1&" + input_ref.name + "=" + escape(input_ref.value));
				var original_value = input_ref.value ;
				var lot_no = input_ref.name.match(/\d+[a-z]?/) ;
				input_ref.value="Updating - please wait";
				input_ref.disabled=true;
				jQuery.ajaxQueue({
					type: "POST",
					url: "ajax",
					data: postdata,
					timeout: 3000,
					dataType: "json",
					success: function(result){
						input_ref.value = original_value.replace( /^\w+ \w+/g, (result[0].my_lots=="true"?"Remove from":"Add to") );
						input_ref.disabled=false;
						// jQuery("#ch_page_my_lots #ch_lot_" + lot_no).fadeOut("slow");
					},
					error: function(xhr,textStatus){
						var orig_val_arr = original_value.split(/\s+/) ;
						alert( "Sorry, it was not possible to " + orig_val_arr[0].toLowerCase() + " lot " + lot_no + " " + orig_val_arr[1] + " your 'my lots' list because an error occurred on the server." + (textStatus!=null?("\n\n("+textStatus+")"):"") );
						input_ref.value = original_value;
						input_ref.disabled=false;
					}
				});
				return false;
			}
		);
	
	});

}