function manageDemographics(element){           
    var table = document.getElementById("mainTable");
    var targetGroup = element.id.split('Select').join('Group');
    var linksArray = table.getElementsByTagName('a');           
    
    if(hasClass(element,'inactive')) {
        removeClass(element,'inactive');
        
        for(var i = 0; i < linksArray.length; i++) {
            var link = linksArray[i];
            if(link.className == targetGroup)
                link.style.display = '';
        }
    }
    else {
        addClass(element,'inactive');
        
        for(var i = 0; i < linksArray.length; i++) {
            var link = linksArray[i];
            if(link.className == targetGroup)
                link.style.display = 'none';
        }

    }
}

function manageDeadlines(element){           
    var table = document.getElementById("mainTable");
    var targetGroup = element.id.split('Select').join('Group');
    var linksArray = table.getElementsByTagName('a');           
    
    if(hasClass(element,'inactive')) {
        removeClass(element,'inactive');
        
        for(var i = 0; i < linksArray.length; i++) {
            var link = linksArray[i];
            if(link.className == targetGroup)
                link.style.display = '';
        }
    }
    else {
        addClass(element,'inactive');
        
        for(var i = 0; i < linksArray.length; i++) {
            var link = linksArray[i];
            if(link.className == targetGroup)
                link.style.display = 'none';
        }

    }
}

function hasClass(ele,cls) {
	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}
function addClass(ele,cls) {
	if (!this.hasClass(ele,cls)) ele.className += " "+cls;
}
function removeClass(ele,cls) {
	if (hasClass(ele,cls)) {
		var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
		ele.className=ele.className.replace(reg,' ');
	}
}