var showPanel = false;

function showhide() {
	if(!showPanel) {
		//document.getElementById('content').style.display = 'none';
		opacity('content',100,0,800);
		document.getElementById('show_hide').style.backgroundImage = 'url(/fileadmin/pics/design/show.gif)';
	} else {
		//document.getElementById('content').style.display = 'block';
		opacity('content',0,100,800);
		document.getElementById('show_hide').style.backgroundImage = 'url(/fileadmin/pics/design/hide.gif)';
	}	
	showPanel = !showPanel;
	return false;
}

function opacity(id, opacStart, opacEnd, millisec) { 
    //speed for each frame 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 

    //determine the direction for the blending, if start and end are the same nothing happens 
    if(opacStart > opacEnd) { 
        for(i = opacStart; i >= opacEnd; i--) { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } else if(opacStart < opacEnd) { 
        for(i = opacStart; i <= opacEnd; i++) 
            { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) { 
    var object = document.getElementById(id).style; 
    object.opacity = (opacity / 100); 
    object.MozOpacity = (opacity / 100); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
}