function init(){
	var inp1 = document.getElementById('input1');
	var inp2 = document.getElementById('input2');
	var inp3 = document.getElementById('input3');
	var inp4 = document.getElementById('input4');

	if(inp1) attachColorPicker(inp1, true);
	if(inp2) attachColorPicker(inp2);
	if(inp3) attachColorPicker(inp3);
	if(inp4) attachColorPicker(inp4);
}

window.onload = init;