function remName(a, b){ 
if(a.value==b){ 
a.value='';
}else if(a.value==''){ 
a.value=b;
}else{ 
a.value=a.value;
} 
}   
function chkName(a, b){ 
if(a.value==''){
a.value=b;
}else{ 
a.value=a.value;
this.style.color='#4894A6';
} 
}