function calculateDegHeight(top, datum, dist, datumht) 



{

if (numcheck(top, 30, 60, "Top angle") && numcheck(datum, -30, 30, "Datum angle") && numcheck(dist, 5, 120, "Distance") && numcheck(datumht, 0, 5, "Datum Height"))

{

if (top>50) {

alert("Angles greater than 50 degrees may produce poor estimates of height")

}

top = degToRad(top)

datum = degToRad(datum)

height = Math.round(10 * (datumht + dist * (Math.tan(top) * Math.abs(Math.cos(datum) - Math.sin(datum)))))/10

}

else

{

height=""

}

return(height)

}



function calculatePercHeight(top, datum, dist, datumht) 



{

if (numcheck(top, 50, 135, "Top angle") && numcheck(datum, -50, 50, "Datum angle") && numcheck(dist, 5, 120, "Distance") && numcheck(datumht, 0, 5, "Datum Height"))

{

if (top>120) {

alert("Angles greater than 120% may produce poor estimates of height")}

height = Math.round(10 * (datumht + dist * ((top - datum)/Math.sqrt(10000+datum*datum))))/10

}

else

{

height=""

}

return(height)

}