function fileSelected(elem) {
	jQuery('input', jQuery(elem.parentNode.parentNode).clone().insertAfter(elem.parentNode.parentNode)).val('');
	jQuery(elem).removeAttr('onchange').after(jQuery('<input>').attr('onclick', 'removeTr(this);').attr('type', 'checkbox'));
}

function removeTr(elem) {
	jQuery(elem.parentNode.parentNode).remove();
}

function typParametruChanged(elem) {
var vybranyTyp = elem.options[elem.selectedIndex].value;

if (vybranyTyp > 0)
	jQuery('#hodnoty').show();
else
	jQuery('#hodnoty').hide();
}

function rozklikDodaci() {
	jQuery('#dodaci-udaje').toggle();
}

this.imagePreview = function(){	
	/* CONFIG */
		
		xOffset = 10;
		yOffset = 30;
		
		// these 2 variable determine popup's distance from the cursor
		// you might want to adjust to get the right result
		
	/* END CONFIG */
	jQuery("a.preview").hover(function(e){
		this.t = this.title;
		this.title = "";	
		var c = (this.t != "") ? "<br/>" + this.t : "";
		jQuery("body").append("<p id='preview'><img src='"+ this.href +"' alt='Image preview' />"+ c +"</p>");								 
		jQuery("#preview")
			.css("top",(e.pageY - xOffset) + "px")
			.css("left",(e.pageX + yOffset) + "px")
			.fadeIn("fast");						
    },
	function(){
		this.title = this.t;	
		jQuery("#preview").remove();
    });	
	jQuery("a.preview").mousemove(function(e){
		jQuery("#preview")
			.css("top",(e.pageY - xOffset) + "px")
			.css("left",(e.pageX + yOffset) + "px");
	});			
};

// starting the script on page load
jQuery(document).ready(function(){
	imagePreview();
});