function toggle_collapse(id){
	var toCollapse = document.getElementById("collapse_" + id);

	if(toCollapse.getAttribute("style") == null){
		toCollapse.setAttribute("style","display:none;");
	} else {
		toCollapse.removeAttribute("style");
	}
	
}

function toggle_collapse_image(id){
	var toCollapse = document.getElementById("collapse_" + id);
	var colImage = document.getElementById("col_image_" + id);
	var colImgStr = colImage.getAttribute("src");
	colImgStr = colImgStr.substr(0,colImgStr.length-8);
	if(toCollapse.getAttribute("style") == null){
		toCollapse.setAttribute("style","display:none;");
		colImage.setAttribute("src",colImgStr + "open.png");
		
	} else {
		toCollapse.removeAttribute("style");
		colImage.setAttribute("src",colImgStr + "clos.png");
	}
	
}