//Global variables
var classPopup = /\bpop\b/;

//Page load function
function init() {
	//Quit if this function has already been called
	if (arguments.callee.done) return;
	
	//Flag this function so we don't do the same thing twice
	arguments.callee.done = true;
	
	//Your page load actions here...
	popupLinks(); //popup class pop links
}

//Popup load and replace function
function popupLinks() {
  for ( x = 0; x < document.links.length; x++ ) {
    if ( classPopup.exec(document.links[x].className) ) {
      window.open(document.links[x]);
	  document.links[x].target="_blank";
    }
  }
}

//Jump menu
function redirectURL(selMenu) {
	window.location = selMenu.options[selMenu.selectedIndex].value;
}

//Unobtrusvie form validation
function checkform()	{
		if(!document.getElementById('required')){return;}

	// Define error messages and split the required fields
		var errorID='errormsg';
		var errorClass='error'
		var errorMsg='Please enter or change the fields marked with a ';
		var errorImg='img/alert.gif';
		var errorAlt='Error';
		var errorTitle='This field has an error!';
		
		var reqs="umbFormName,umbFormEmail"
		var reqfields=reqs.split(',');

	// Cleanup old mess
		// if there is an old errormessage field, delete it
		if(document.getElementById(errorID))
		{
			var em=document.getElementById(errorID);
			em.parentNode.removeChild(em);
		}
		// remove old images and classes from the required fields
		for(var i=0;i<reqfields.length;i++)
		{
			var f=document.getElementById(reqfields[i]);
			if(!f){continue;}
			if(f.previousSibling && /img/i.test(f.previousSibling.nodeName))
			{
				f.parentNode.removeChild(f.previousSibling);
			}
			f.className='';
		}
	// loop over required fields
		for(var i=0;i<reqfields.length;i++)
		{
	// check if required field is there
			var f=document.getElementById(reqfields[i]);
			if(!f){continue;}
	// test if the required field has an error, 
	// according to its type
			switch(f.type.toLowerCase())
			{
				case 'text':
					if(f.value=='' && f.id!='email'){cf_adderr(f)}							
	// email is a special field and needs checking
					if(f.id=='email' && !cf_isEmailAddr(f.value)){cf_adderr(f)}							
				break;
				case 'textarea':
					if(f.value==''){cf_adderr(f)}							
				break;
				case 'checkbox':
					if(!f.checked){cf_adderr(f)}							
				break;
				case 'select-one':
					if(!f.selectedIndex && f.selectedIndex==0){cf_adderr(f)}							
				break;
			}
		}
		return !document.getElementById(errorID);

		/* Tool methods */
		function cf_adderr(o)
		{
			// create image, add to and colourise the error fields
			var errorIndicator=document.createElement('img');
			errorIndicator.alt=errorAlt;
			errorIndicator.src=errorImg;
			errorIndicator.title=errorTitle;
			o.className=errorClass;
			o.parentNode.insertBefore(errorIndicator,o);

		// Check if there is no error message
			if(!document.getElementById(errorID))
			{
			// create errormessage and insert before submit button
				var em=document.createElement('div');
				em.id=errorID;
				var newp=document.createElement('p');
				newp.appendChild(document.createTextNode(errorMsg))
				// clone and insert the error image
				newp.appendChild(errorIndicator.cloneNode(true));
				em.appendChild(newp);
				// find the submit button 
				for(var i=0;i<of.getElementsByTagName('input').length;i++)
				{
					if(/submit/i.test(of.getElementsByTagName('input')[i].type))
					{
						var sb=of.getElementsByTagName('input')[i];
						break;
					}
				}
				if(sb)
				{
					sb.parentNode.insertBefore(em,sb);
				}	
			} 
		}
		function cf_isEmailAddr(str) 
		{
			return str.match(/^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/);
		}
}