// JavaScript Document
// Bild wechseln
function change_pic(file_name,file_text){
	document.getElementById('pic').src = 'img/fertigung/' + file_name + '.jpg';
	if (file_text.length = 0) {
		var file_text = " "
	}
	
		document.getElementById('text').innerHTML  = file_text;
}


//Slideshow Gallerie

var interval_right;
var interval_left;
var speed = 45; // interval Geschwindigkeit

function gallery_right(){
	var negativ = 0;

	var pics = document.getElementById('picture').getElementsByTagName('nobr')[0].offsetWidth - document.getElementById('picture').parentNode.offsetWidth;
	interval_right = window.setInterval(gallery_right,speed);

	function gallery_right(){	
	
		margin_left = document.getElementById('picture').style.marginLeft ;
		if(margin_left == '') {
			margin_left = 0;
		}
		else {
			margin_left = margin_left.replace(/px/g, '');
		}
		
		if ( (document.getElementById('picture').parentNode.offsetWidth+97) >= document.getElementById('picture').offsetWidth && negativ < 10 ){
			negativ = negativ + 0.5 ;
		} else {
			negativ = 10 ;
		}
		
		margin_left = parseInt(margin_left) ;
		pixel_pics = pics;
				
		margin_left = margin_left - negativ;

		if (parseInt(margin_left) > -pics && negativ > 0){
		
			document.getElementById('picture').style.marginLeft = ''+margin_left+'px';
			document.getElementById('left').src = 'img/pfeillinks_klein.jpg';
			document.getElementById('left').style.cursor = 'pointer';

		} else if (parseInt(margin_left) <= -pics ) {

			document.getElementById('picture').style.marginLeft = '-' + pics + 'px';
			document.getElementById('right').src = 'img/pfeilrechts_grey_klein.jpg';
			document.getElementById('right').style.cursor = 'auto';
			window.clearInterval(interval_right);
			
		}
	}
}

function gallery_left(){
	
	var negativ = 0;
	
	interval_left = window.setInterval(gallery_left,speed);
	var pics = document.getElementById('picture').getElementsByTagName('nobr')[0].offsetWidth - document.getElementById('picture').parentNode.offsetWidth;

	function gallery_left(){		
	
		margin_left = document.getElementById('picture').style.marginLeft ;
		
		if(margin_left == '') {
			margin_left = 0;
		}
		else {
			
			
			margin_left = margin_left.replace(/px/g, '');
		}
		
		margin_left = parseInt(margin_left) ;
		
		if (document.getElementById('picture').offsetWidth >= (document.getElementById('picture').getElementsByTagName('nobr')[0].offsetWidth-97) && negativ < 10){
			negativ = negativ + 0.5 ;
		}else{
			negativ = 10 ;
		}
		
		margin_left = margin_left + negativ;

		if (parseInt(margin_left) < 0 && negativ > 0 ){

			document.getElementById('picture').style.marginLeft = ''+margin_left+'px';
			document.getElementById('right').src = 'img/pfeilrechts_klein.jpg';
			document.getElementById('right').style.cursor = 'pointer';					

		} else if (parseInt(margin_left) >= 0  ) {
			
			document.getElementById('picture').style.marginLeft = '0px';
			document.getElementById('left').src = 'img/pfeillinks_grey_klein.jpg';
			document.getElementById('left').style.cursor = 'auto';
			window.clearInterval(interval_left);
			
		}
	}
}

function gallery_stop(position){
	
	if (position == 'right'){
		window.clearInterval(interval_right);
		document.getElementById('left').src = 'img/pfeillinks_klein.jpg';
		document.getElementById('left').style.cursor = 'pointer';
		
	} else if(position == 'left'){
		
		window.clearInterval(interval_left);
		document.getElementById('right').src = 'img/pfeilrechts_klein.jpg';
		document.getElementById('right').style.cursor = 'pointer';
		
	}
}