/** Some scripts from Dynamic Drive (www.dynamicdrive.com) when credited **/

var ns6=document.getElementById&&!document.all
var ie=document.all

function submitonce(theform) {
	if (document.all||document.getElementById){
		for (i=0;i<theform.length;i++){
			var tempobj=theform.elements[i]
			if(tempobj.type.toLowerCase()=="submit")
			tempobj.disabled=true
		}
	}
}

// *** HIGHLIGHT FOCUSED FORM ELEMENTS
// Inside <FORM > tag: onkeyup=\"hl(event, '#ACE9E4', 'solid solid solid solid')\" onclick=\"hl(event, '#ACE9E4', 'solid solid solid solid')\"> 
var highlightcolor='#ACE9E4'
var previous=''
var eventobj

//Regular expression to highlight only form elements
var intended=/INPUT|TEXTAREA|SELECT|OPTION/
//var excludedclasses=/CHECKBOX|pekebutton|dprice|ddto|subtotal/
var excludedclasses=/CHECKBOX|pekebutton/

//Function to check whether element clicked is form element
function checkel(which){
	if (which.style && !excludedclasses.test(which.className) && intended.test(which.tagName)){
	//if (which.style && intended.test(which.tagName)){
	if (ns6&&eventobj.nodeType==3)
	eventobj=eventobj.parentNode.parentNode
	return true
	}
	else
	return false
}

//Function to highlight form element
function hl(e,hl_color,b_style){
	eventobj=ns6? e.target : event.srcElement
	if (previous!=''){
		if (checkel(previous)) {
			previous.style.backgroundColor=''
			previous.style.borderStyle=b_style
		}
		previous=eventobj
		if (checkel(eventobj)) {
			if (!eventobj.disabled) {
				eventobj.style.backgroundColor=hl_color
				eventobj.style.borderStyle='solid solid solid solid'
			}
		}
	}
	else{
		if (checkel(eventobj)) {
			if (!eventobj.disabled) {
				eventobj.style.backgroundColor=hl_color
				eventobj.style.borderStyle='solid solid solid solid'
			}
		}
		previous=eventobj
	}
}

// *** INTRO CHANGES FORM ELEMENT INSTEAD OF SUBMITTING THE FORM
// inside form element: onkeypress="return handleEnter(this, event)"
function handleEnter (field, event) {
	var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
	if (keyCode == 13) {
		var i;
		for (i = 0; i < field.form.elements.length; i++)
		if (field == field.form.elements[i])
		break;
		i = (i + 1) % field.form.elements.length;
		field.form.elements[i].focus();
		return false;
	} 
	else
	return true;
}

// *** comprueba que haya almenos una checkbox seleccionada

function anyCheckboxSelected(theForm) {
	var anySelected=0;
	for (i=0,n=theForm.elements.length;i<n;i++)
	  if (theForm.elements[i].className.indexOf('COMPRAR') !=-1) {
	    if (theForm.elements[i].checked)
	    	anySelected++;
	  }
	return anySelected;
}

function submit_confirm(theForm,theModeValue,theMessage,mustcheck,theExtravalue){

	if (mustcheck)
	if (!anyCheckboxSelected(theForm)) {
		alert('Para continuar debes seleccionar al menos un disco o canción.\n\nElige qué discos o canciones quieres pulsando las carátulas o marcando las casillas.');
		return false;
	}
		
	if (theMessage.length)
	if (!confirm(theMessage))
		return false;
	
	if (theExtravalue.length>0) {
		theForm.extravalue.value = theExtravalue;
	}
	if (theModeValue.length>0) {
		theForm.mode.value = theModeValue;
	}
	submitonce(theForm);
	theForm.submit();
	return false;
}

function rewriteformvalue(name,value) {
	var myelem = document.getElementById(name);
	if (myelem) { myelem.setAttribute("value", value); } else alert("rewriteformvalue() could not find element by ["+name+"]");
}

function printit(){  
	if (window.print) {
		window.print() ;
	} else {
  	var WebBrowser = '<OBJECT ID="WebBrowser1" WIDTH=0 HEIGHT=0 CLASSID="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"><\/OBJECT>';
		document.body.insertAdjacentHTML('beforeEnd', WebBrowser);
		WebBrowser1.ExecWB(6, 1);//Use a 1 vs. a 2 for a prompting dialog box    WebBrowser1.outerHTML = "";  
	}
}