function changeVal() {
	if(document.getElementById('uid24')) {
		var anInput = document.getElementById('uid24');
	} else if(document.getElementById('uid25')) {
		var anInput = document.getElementById('uid25');
	}
	if(window.location.pathname == '/en/') {
		var defaultValue = 'Please solve the math problem';
	} else {
		var defaultValue = 'Bitte lösen Sie die Rechenaufgabe';
	}
	
	anInput.value = defaultValue;
	
	
	anInput.onfocus = function () {
		if(this.value == defaultValue )  {
			this.value = '';
		}
	}
}

changeVal();