<body>
<script>
function renk_ver(adi1) {
adi1.style.backgroundColor = "yellow";
document.body.this.style.backgroundColor = "blue";
}
function renk_beyaz(adi2){
adi2.style.backgroundColor = "white";
document.body.this.style.backgroundColor = "blue";
}
</script>
<form>
<input type="text" onclick="renk_ver(this)" onmouseout="renk_beyaz(this);">
<input type="text" onclick="renk_ver(this)" onmouseout="renk_beyaz(this);">
</form>
</body>
</html>