function validate_form ( )
{
    valid = true;

	if ( document.myform.make.value == "" )
    {alert ( "Please select a Make." ); valid = false;}

    else if ( document.myform.optone.value == "" )
    {alert ( "Please select a Model." ); valid = false;}
	
	else if ( document.myform.os1.value == "" )
    {alert ( "Please select a Year." ); valid = false;}
	
	else if ( ( document.myform.os2[0].checked == false )
    && ( document.myform.os2[1].checked == false ) )
    {alert ( "Please select a Clutch Length." ); valid = false;}
	
	else if ( ( document.myform.os3[0].checked == false )
    && ( document.myform.os3[1].checked == false ) )
    {alert ( "Please select a Brake Length." ); valid = false;}
	
	else if ( ( document.myform.os4[0].checked == false )
    && ( document.myform.os4[1].checked == false ) 
	&& ( document.myform.os4[2].checked == false ) 
	&& ( document.myform.os4[3].checked == false ) 
	&& ( document.myform.os4[4].checked == false ) 
	&& ( document.myform.os4[5].checked == false ) )
    {alert ( "Please select a Lever Color." ); valid = false;}
	
	else if ( ( document.myform.os5[0].checked == false )
    && ( document.myform.os5[1].checked == false ) 
	&& ( document.myform.os5[2].checked == false ) 
	&& ( document.myform.os5[3].checked == false ) 
	&& ( document.myform.os5[4].checked == false ) 
	&& ( document.myform.os5[5].checked == false ) )
    {alert ( "Please select an Adjustment Knob Color." ); valid = false;}
	
	else if ( document.myform.terms.checked == false )
    {alert ( "Please agree to the terms & conditions." ); valid = false;}

    return valid;
}