function approvals() {
HI=window.open("approvals_worldwide.html","HI","toolbar=0,location=0,status=0,menubar=1,scrollbars=0,resizable=0,width=350,height=510,top=40,left=40")
}

function gauge_table() {
HI=window.open("liquid_level_gauge_table.html","HI","toolbar=1,location=0,status=0,menubar=1,scrollbars=1,resizable=1,width=780,height=500,top=40,left=40")
}

function voidme () {
}

function approvals() {
HI=window.open("approvals_worldwide.html","HI","toolbar=0,location=0,status=0,menubar=1,scrollbars=0,resizable=0,width=350,height=518,top=40,left=40")
}


function materials() {
HI=window.open("safety_valve_materials.html","HI","toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,width=460,height=490,top=40,left=40")
}

function seals() {
HI=window.open("safety_valve_seals.html","HI","toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,width=460,height=490,top=40,left=40")
}