// JavaScript Document

function convert_plat_to_cent_gramme(id_poid,id_source,id_target) {
	var poid=parseFloat(document.getElementById(id_poid).value);
	var poid_source=parseFloat(document.getElementById(id_source).value);
	var ratio_poid=100/poid;	
	var poid_target=Math.round( ( ratio_poid*poid_source ) * 100 ) / 100;	
	if (poid_target>0) {
		document.getElementById(id_target).value=poid_target;
	}
}


function convert_pourcent_to_cent_gramme(id_poid,id_source,id_target) {
	var poid=parseFloat(document.getElementById(id_poid).value);
	var pourcent_source=parseFloat(document.getElementById(id_source).value);
	var poid_target=Math.round( pourcent_source * 100 ) / 100;
	if (poid_target>0) {
		document.getElementById(id_target).value=poid_target;
	}
}

function convert_kjoule_to_kcal(id_source,id_target) {
	var kjoule=parseFloat(document.getElementById(id_source).value);
	var kcal=Math.round( (kjoule/4.19) * 100 ) / 100;
	if (kcal>0) {
		document.getElementById(id_target).value=kcal;
	}
}

function convert_kjoule_plat_to_kcal_plat(id_source_plat, id_target, id_poid) {
	var kjoule_plat=parseFloat(document.getElementById(id_source_plat).value);
	var poid=parseFloat(document.getElementById(id_poid).value);	
	var kjoule=(kjoule_plat/poid)*100;
	var kcal=Math.round( (kjoule/4.19) * 100 ) / 100;	
	if (kcal>0) {
		document.getElementById(id_target).value=kcal;
	}
}

function convert_sodium_to_sel(id_source,id_target) {
	var sodium=parseFloat(document.getElementById(id_source).value);
	var sel=Math.round( (sodium*2.54) * 100 ) / 100;
	if (sel>0) {
		document.getElementById(id_target).value=sel;
	}
}

function convert_sodium_plat_to_sel(id_source_plat, id_target, id_poid) {
	var sodium_plat=parseFloat(document.getElementById(id_source_plat).value);
	var poid=parseFloat(document.getElementById(id_poid).value);
	var sodium=(sodium_plat/poid)*100;
	var sel=Math.round( (sodium*2.54) * 100 ) / 100;
	if (sel>0) {
		document.getElementById(id_target).value=sel;
	}
}

function disable_select(val, id_target) {
	if (val!="") {
		document.getElementById(id_target).disabled=true;
	}
	else {
		document.getElementById(id_target).disabled=false;
	}
}