function set_product_attributes(sender) {
	var input = document.createElement('INPUT');
	input.type = "hidden";
	input.name = "args[leading_attribute]";
	var matches = sender.name.match(/args\[attributes\]\[(\d+)\]/i);
	if (!empty(matches)) {
		input.value = matches[1];
		sender.form.appendChild(input);				
		sender.form.submit();		
	}
}

function set_product_attributes_nosubmit(sender) {
	var input = document.createElement('INPUT');
	input.type = "hidden";
	input.name = "args[leading_attribute]";
	var matches = sender.name.match(/args\[attributes\]\[(\d+)\]/i);
	if (!empty(matches)) {
		input.value = matches[1];
		alert(input.value);
		sender.form.appendChild(input);	
	}
}

function remember_quantity(sender, from_id) {
	var input = document.createElement('INPUT');
	var dropdownIndex = document.getElementById(from_id).selectedIndex;
	var dropdownValue = document.getElementById(from_id)[dropdownIndex].value;
	input.type = "hidden";
	input.name = "args[quantity]";
	input.value = dropdownValue;
	sender.form.appendChild(input);
}

function empty_on_edit(sender) {
	if(!isset(sender.initValue))sender.initValue=sender.defaultValue;
	if (sender.value == sender.initValue)sender.value = '';
	sender.onblur = function() {if(this.value == '')this.value = this.initValue;}
	sender.ondblclick = function() {this.value = this.initValue;}
}

function set_sort(form, field){
	var sort_by = document.getElementById(form).elements.namedItem('args[sort_by]');
	var sort_order = document.getElementById(form).elements.namedItem('args[sort_order]');
	sort_order.value = (sort_by.value == field && sort_order.value == SORT_ASC) ? SORT_DESC : SORT_ASC;
	sort_by.value = field;
	document.getElementById(form).submit();
}

function set_page(form, page_nr){
	var page_no = document.getElementById(form).elements.namedItem('args[page_no]').value = page_nr;
	document.getElementById(form).submit();
}

function set_items_per_page(form, item_count) {
	document.getElementById(form).elements.namedItem('args[items_per_page]').value = item_count;
	document.getElementById(form).submit();
}

function empty(mixed_var) {
	if (mixed_var === "" || mixed_var === 0 || mixed_var === "0"
	|| mixed_var === null || mixed_var === false || mixed_var === undefined
	|| ((typeof mixed_var == 'array' || typeof mixed_var == 'object') && mixed_var.length === 0) ){
		return true;
	}

	return false;
}

/** Ajax request functions **/
var aPlaceholders =[];
function process_submit(sender, sPlaceholder, sTemplate, sLoaderdiv){
	var placeholder = null, xmlHttp;	
	if( isset(sPlaceholder) ){
		if (!isset(aPlaceholders[sPlaceholder]) ) { // dont allow multiple calls on same placeholder	
			placeholder=document.getElementById(sPlaceholder);
			xmlHttp = new clXmlHttp();
			xmlHttp.onReady = process_result;
			xmlHttp.tag = sPlaceholder;
			aPlaceholders[sPlaceholder] = xmlHttp;						
			placeholder.disabled=true;					
			if( document.getElementById(sLoaderdiv) != null )document.getElementById(sLoaderdiv).style.display = 'block';                                                                                                                                                            
				
			// get all data elements and put them in request sting			
			var oForm = sender.form, oElement, aPostVariables=Array();
			for( i=0; i<oForm.elements.length; i++ ){
				oElement=oForm.elements[i];
				switch(oElement.type){
					case 'submit':	
						oElement.disabled=true;	
				  	break;
					case 'checkbox':
				 		if(oElement.checked)aPostVariables[oElement.name]=oElement.name + '=' + oElement.value;
				  	break;
					default: aPostVariables[oElement.name]=oElement.name + '=' + oElement.value;
				}				
			}	
			//always add as last, overwriting false values 
			aPostVariables['request']='request=page';
			aPostVariables['args[page]']='args[page]='+sTemplate;
			var params ='';
			for(var aVar in aPostVariables) {if( typeof aPostVariables[aVar] =="string" )params +='&'+aPostVariables[aVar];}
			params = trim(params, '&');
			xmlHttp.makePOSTRequest(ajax_url, true, params);	
		}	
	}		
	return false;
}

function process_result(sender){	
	var oPlaceholder;	
	try{
		if( isset(sender) ){ 
			if( isset(sender.tag) ){
				aPlaceholders[sender.tag] = null;
			 	oPlaceholder =document.getElementById(sender.tag);
				var oResult =  this.responseText();		
				oPlaceholder.disabled=false;
				oPlaceholder.innerHTML =oResult;						
			}
		}
	}catch(e){alert(e.message);}
}

function show_details(form_id, input_id, value) {
	var process_form = document.getElementById(form_id);
	var process_input = document.getElementById(input_id);
	process_input.value = value;

	process_form.submit();
}